What is ICL (Implantable Collamer Lens)? Safety and Side Effects Explained by an Ophthalmologist Objective facts about corneal-preserving vision correction, operating principles, and safety factors.Dr. Yoon-Joong SongOphthalmologist | BGN Eye Clinic JamsilQ. "I was recommended ICL surgery, but the thought of placing a lens inside my eye makes me worry about safety and side effects."Hello, I am Dr. Yoon-Joong Song from BGN Eye Clinic Jamsil.Meeting patients in the examination and consultation rooms, one of the most common questions I receive is regarding the safety and potential side effects of Implantable Collamer Lens (ICL) surgery. Concerns such as "Could the lens move around inside my eye?" or "Can it be reversed if a problem occurs later?" often stem from vague anxiety. Today, I would like to clarify the facts behind these common fears.Table of Contents1. What Exactly is ICL (Implantable Collamer Lens) Surgery?2. Common Misconceptions and Side Effects of ICL3. Is There Enough Space in My Eye? (Precision Measurement & Q&A)What Exactly is ICL (Implantable Collamer Lens) Surgery?ICL surgery is a procedure that corrects vision by inserting a specially crafted micro-lens behind the iris (in front of the natural crystalline lens) without cutting or reshaping the cornea. It is widely known by its medical abbreviation, ICL (Implantable Collamer Lens).Since laser vision correction methods like LASIK or LASEK reshape and remove a specific amount of corneal tissue, they may have limitations for individuals with extreme high myopia, thin corneas relative to their prescription, or severe astigmatism. In contrast, ICL surgery preserves the natural corneal structure intact, making it a viable alternative when considering vision improvement without the burden of corneal thickness constraints.Common Misconceptions and Side Effects of ICLMany patients hesitate due to unverified online information or vague fears about ICL risks. Here are the objective facts regarding the most frequent misconceptions and side effects encountered in clinical practice.Misconception 1. Will the inserted lens move out of place inside the eye?To give you a direct answer, a custom-sized lens designed to your exact eye dimensions cannot move around freely. The lens is safely positioned in the stable "posterior chamber" between the iris and the natural lens. As long as appropriate lens sizing and positioning are secured, the likelihood of dislocation is extremely low. For patients with astigmatism, Toric ICLs are designed to minimize rotation and are meticulously aligned along the precise astigmatic axis.Misconception 2. Is the procedure irreversible once completed?It is actually the exact opposite. One of the greatest advantages of ICL surgery is its reversibility. Unlike laser procedures that permanently remove corneal tissue, ICL allows the lens to be removed or replaced if unexpected changes or ocular diseases develop later, restoring the eye to its pre-surgery state.Misconception 3. Does it severely worsen dry eyes and increase intraocular pressure (IOP)?This concern originates from early-generation lens models. Because ICL surgery does not disrupt or cut the surface nerves of the cornea, the risk of postoperative dry eye syndrome is significantly lower compared to laser methods.Furthermore, modern EVO+ ICL lenses feature a central hole design that facilitates natural aqueous humor circulation inside the eye. This structural innovation minimizes the risk of elevated intraocular pressure and related complications.Dr. Yoon-Joong Song's ICL Surgery CheckpointsExtreme High Myopia & Astigmatism Correction: Toric ICL designs minimize rotation, ensuring stable alignment on the calculated axis.Corneal Preservation: An excellent alternative for patients hesitant about corneal tissue removal.Reversible Procedure: Retains the option to remove the lens and restore the eye to its original state if necessary.Preoperative Precision Measurement: Essential evaluation of internal ocular space and anterior chamber depth using UBM (Ultrasound Biomicroscopy).※ Depending on individual anatomical conditions, potential ICL side effects such as night halos or temporary spikes in intraocular pressure can occur. Thorough preoperative examinations are essential to prevent these risks.Is There Enough Space in My Eye? (Precision Measurement & Q&A)Q. "How can I check before surgery if there is sufficient space in my eye for the lens?"A. One of the most critical factors we evaluate in the consultation room is the physical space inside the eye. During preoperative examinations, we rigorously measure whether the Anterior Chamber Depth (ACD) meets the safe threshold (typically 2.8mm or greater) and confirm that the corneal endothelial cell density, which maintains corneal clarity, falls within a safe range. Only when these criteria are fully met do we proceed to customized lens design. When considering ICL surgery, the most vital aspect is verifying whether "a precise personalized design precedes the procedure." The anterior chamber depth, internal ocular space, and the distance between the lens and natural crystalline lens (vaulting) must be measured without error to select the ideal lens size.At BGN Eye Clinic Jamsil, we utilize a multi-dimensional diagnostic system including UBM (Ultrasound Biomicroscopy) to provide tailored solutions ranging from internal ocular structure analysis to astigmatism axis calculations. Because ICL surgery does not reshape the corneal stroma, recovery is remarkably fast, most patients can comfortably resume light daily activities the day after surgery, provided there are no unusual clinical findings.Rather than delaying your decision due to vague concerns, we recommend scheduling a comprehensive examination to accurately understand your eye condition.

The Golden Window for LASEK Recovery:5 Essential Care Tips for Faster Healing“Surgery finishes at the clinic, but recovery is completed at home.”Hello, this is the main branch of BGN Eye Clinic at Jamsil Lotte World Tower.Today, we are addressing one of the most common questions we hear in our consultation room: “How careful do I really need to be after LASEK?” With proper early care, LASEK offers a much smoother recovery. We’ve packed this post with practical clinical advice to help you regain clear, comfortable vision day by day.Why Is Post-LASEK Care So Crucial?LASEK involves gently removing the outermost layer of the cornea (the epithelium) and precisely reshaping the underlying tissue (stroma) with a laser. Simply put, you can think of it as “your eye surface generating brand-new skin.”Unlike LASIK, which creates a corneal flap, LASEK leaves your eyes slightly more sensitive immediately after surgery. They will react to minor irritants such as wind, light, and dust. Because a thin new film is forming over the corneal surface, even minimal friction can easily trigger dryness or discomfort.While our medical team corrects your vision on the day of surgery, maintaining and stabilizing that clarity depends entirely on your daily routine. The first two weeks post-surgery represent the critical ‘golden period’ for your eyes to self-heal and adapt.5 Essential Care Rules During LASEK Recovery1. Apply Preservative-Free Artificial Tears ConsistentlyYour eyes may dry out quickly and feel blurry after LASEK. This is a temporary symptom that occurs while the corneal epithelium regenerates. Use preservative-free artificial tears at least 6 times a day.Pro Tip: Keeping your eye drops refrigerated reduces irritation upon application and offers long-lasting cooling relief, a favorite feature among our patients. Remember: “Hydrate before your eyes feel dry!”2. Absolutely No Eye Rubbing!Because your epithelial cells are actively regenerating, your eyes are vulnerable to even slight pressure. Rubbing your eyes forcefully can detach the new epithelium or cause scratches, delaying recovery and potentially leading to corneal opacity in severe cases.If your eyes itch, flush them with artificial tears instead of using your hands. If you worry about touching your eyes while sleeping, we strongly recommend wearing protective eye shields at night.3. UV Protection Is Mandatory, Sunglasses Are Your ShieldUltraviolet (UV) radiation puts stress on healing corneal cells and can induce scarring. Always wear sunglasses with UV 400 protection whenever you step outdoors. Make it a habit to carry them every day, as UV rays are present on cloudy days just as much as on sunny ones.4. Rest Your Eyes Every Hour During Screen TimeDigital screens accelerate tear evaporation, worsening dry eye symptoms. After 1 hour of device use, close your eyes and rest for at least 1 minute. Match your screen brightness to your ambient room lighting, and avoid using smartphones in dark environments.5. Avoid Swimming, Saunas, and Strenuous Exercise for 4 WeeksEyes recover at a slower pace than the rest of your body. Chlorine in swimming pools and high heat in saunas elevate the risk of infection. Furthermore, intense weight training increases intraocular pressure, adding unwanted strain. Stick to light walks during this period.Closing Remarks from Nurse Eumji JangPost-LASEK recovery care is ultimately “a process of gifting your eyes time to rest.” With a little extra mindfulness, you will experience clearer, more comfortable vision every single day. While doctors perform the surgery, the healing process is crafted by you.When it comes to eye health, “a little caution” makes a world of difference compared to “a moment of carelessness.” Wishing you a bright and healthy day ahead! This has been Eumji Jang from BGN Eye Clinic.

Why Do My Eyes Feel Drier Even When Using Artificial Tears Continuously?Healthy Vision Guide by BGN Eye Clinic Jamsil Lotte World TowerHello, this is BGN Eye Clinic at Jamsil Lotte World Tower Main Branch. Lately, there is a question we hear multiple times a day in our examination rooms:“My eyes are so dry, so I keep using artificial tears, but why do they feel increasingly dry and gritty?”When your eyes feel stinging, gritty, or unfocused, applying artificial tears provides temporary relief. However, shortly after, they dry up again, leading you to apply drops once more: a vicious cycle that so many people experience.I completely understand that feeling. Staring at screens in the examination room all day causes a burning sensation in my eyes, prompting me to use eye drops frequently. Yet, at a certain point, even I caught myself thinking, “This is strange. The more I put in, the drier they get.” That was the moment I realized my eyes were signaling me to stop. When your eyes fail to get time to heal on their own and become dependent solely on external moisture, it brings temporary comfort, but it ultimately triggers an unhealthy cycle where your eyes grow more sensitive and parched.Today, I would like to explain why this happens, both from the perspective of an optometrist and through my personal experience as an office worker who uses their eyes all day long.1. “Are My Eyes Addicted?” No, But ‘Dependence’ Does DevelopFirst, let us clear up a common misconception. Medically speaking, artificial tears do not cause chemical addiction. They simply replenish moisture and lubricating agents, meaning they do not affect your nervous system like caffeine or pharmacological drugs do.However, frequent use deprives your eyes of the opportunity to recover naturally, which can feel like dependence. In other words, it is not an addiction, but rather a state where your eyes become overly reliant on external moisturizers.2. Why Do Frequent Artificial Tears Make Your Eyes Feel Drier?This aligns perfectly with my own experience. Last winter, I applied artificial tears 8 to 10 times a day. The air was extremely dry, and wearing a mask made my eyes sting all day whenever my condition was sub-optimal.Paradoxically, the more eye drops I used, the faster my eyes dried out, and I even woke up in the morning feeling a foreign body sensation, as if my eyelids were stuck together. The reason is that my eyes lost the opportunity to restore their natural tear film.Our eyes possess an inherent self-moisturizing system. Using artificial tears too frequently leaves this natural recovery mechanism idle. Furthermore, frequent use of products containing preservatives can damage surface corneal cells or trigger inflammatory reactions.In fact, one of our patients was using preservative-containing bottled artificial tears 10 times a day, mentioning that preservative-free options were too costly. Upon examination, her cornea showed rough surface damage. Remarkably, after switching to preservative-free single-use drops, her condition improved significantly within just one week.3. How to Use Artificial Tears CorrectlyArtificial tears are not inherently bad; how you use them makes all the difference. Here are 3 essential tips I always emphasize to my patients:Use Preservative-Free Single-Dose ProductsIf you apply drops more than 4 times a day, preservative-free products are strongly recommended. Long-term use of preserved drops can irritate the ocular surface. Single-use vials are hygienic and safe, especially right after eye surgery or for sensitive eyes.Do Not Blink Immediately After ApplicationAfter placing a drop in your eye, keep your eyes closed for 5 seconds to allow the tear film to spread evenly. Blinking immediately causes the solution to wash away, reducing its effectiveness. Waiting just a few moments keeps the moisturizing effect active much longer.Maintain Ambient HumidityA humidifier is often more effective than artificial tears themselves. In winter, be sure to hang a wet towel if a humidifier is unavailable. If indoor air is dry, any applied moisture evaporates rapidly, making environmental management crucial.4. The Root Causes: Eye Fatigue and EnvironmentStaring at smartphones and computer screens all day without blinking sufficient times is the primary culprit. Every time you blink, your tear film is replenished; when blinking decreases, your eyes dry out immediately. Even I catch myself staring at my monitor thinking, “Ah, I stopped blinking again…”An Optometrist’s Daily RoutineI make it a rule to set an alarm every 2 hours to perform eye stretches and to close my eyes for 10 seconds of rest before applying any artificial tears.5. What If Dryness Persists?If artificial tears alone do not relieve your dryness, it is highly probable that you are dealing with chronic dry eye disease rather than simple, temporary dryness. Chronic dry eye refers to a state where the overall quality of your tears has degraded, not merely a deficiency in tear volume.When the lipid layer of the tear film is insufficient, tears evaporate rapidly. Meibomian gland dysfunction impairs tear film stability, while eyelid inflammation or ocular surface damage reduces moisture retention. In such cases, applying artificial tears alone cannot address the root issue. Therefore, a structured, step-by-step care routine is necessary:Warm CompressesPlace a warm compress or a damp warm towel over your eyelids for 5 to 10 minutes. This softens hardened oils in the Meibomian glands, encouraging smooth lipid secretion so tears remain on the eye surface longer. (Tip: Ensure the compress is comfortably warm, just slightly above body temperature.)Eyelid CleansingCleansing the eyelid margins every morning and evening reduces inflammation. Use a mild, dedicated eyelid cleanser or diluted baby shampoo on a cotton swab to gently wipe the area. (Tip: Clean thoroughly along the lash line, taking care not to get cleanser inside the eye.)Regular Check-upsReceiving regular eye examinations helps monitor tear film stability, Meibomian gland health, and ocular surface damage. Following an evaluation, customized clinical treatments, such as prescribed medications, mechanical gland expression, or specialized ophthalmic ointments, can be combined for optimal results.In summary, chronic dry eye is not simply a matter of “lacking tears,” but rather “tears failing to function properly.” Use artificial tears as a supportive aid while incorporating these 3 care steps to keep your eyes significantly more comfortable and accelerate long-term recovery.“How much rest did my eyes get today?”Make it a habit to ask yourself this question every day.BGN Eye Clinic fully supports your precious vision and eye health.

SMILE vs. SMILE Pro: Which Vision Correction Surgery is Best for You?BGN Eye Clinic Jamsil Lotte Tower Hello from BGN Eye Clinic Jamsil Lotte Tower!When preparing this post, we reflected on the question our patients ask most frequently during consultations and clinical exams: "What is the difference between SMILE and SMILE Pro?"Questions like "Is SMILE Pro significantly better?" or "How do the two procedures actually differ?" come up every day. Many patients mention that after watching review videos and reading online comparisons, they ended up feeling even more confused. Today, we will break down the differences between SMILE and SMILE Pro comprehensively, based on the actual explanations we provide in our examination rooms!How SMILE and SMILE Pro Differ from Traditional LASIKSMILE corrects vision by creating a tiny, 2mm incision on the cornea, through which a microscopic tissue layer called a lenticule is carefully removed. Many patients wonder how this technique compares to traditional LASIK.Traditional LASIK requires creating a corneal flap (like a small lid), opening it, and applying a laser beneath the surface. Because of the larger incision area, recovery can take a bit longer, and some temporary discomfort may occur.Key Differences at a GlanceLASIK: Creates a corneal flap before applying the laser treatment.SMILE / SMILE Pro: Operates without a corneal flap, using a minimal 2mm incision to extract the lenticule.By maintaining a drastically smaller incision area, SMILE preserves the structural integrity of the cornea to the highest degree possible. Its exceptionally fast recovery time makes it a preferred choice for active individuals.Understanding VisuMax: The Technology Behind SMILESMILE procedures are performed using state-of-the-art VisuMax femtosecond laser technology developed by ZEISS, a world-leading German optics manufacturer. At BGN Eye Clinic Jamsil Lotte Tower, we take immense pride in operating these advanced, high-precision systems.Some patients ask whether all laser equipment delivers identical results. However, we always emphasize that surgical technology plays a pivotal role in final clinical outcomes. BGN Eye Clinic utilizes genuine ZEISS VisuMax systems that undergo regular, certified maintenance directly from ZEISS headquarters.What Is the Core Difference Between SMILE and SMILE Pro?Both procedures share the exact same underlying surgical principle. The primary distinction lies in the technology upgrade: SMILE Pro utilizes the next-generation VisuMax 800 platform.Key Advantages of VisuMax 800 (SMILE Pro)Significantly Faster Laser Delivery: Laser application time is drastically reduced compared to legacy systems.Automated Precision Alignment: Features advanced centration and astigmatism axis compensation for enhanced precision.Enhanced Patient Comfort: The shortened surgical time substantially minimizes anxiety during the procedure.Is There a Difference in Recovery Time?Both SMILE and SMILE Pro offer exceptionally rapid recovery. A vast majority of our patients comfortably resume their normal routine the day after surgery.However, because laser exposure is noticeably shorter with SMILE Pro, patients frequently report feeling more relaxed during and immediately after the procedure. For individuals with sensitive eyes or higher procedural anxiety, SMILE Pro often provides a smoother overall experience. Nonetheless, personal recovery rates vary depending on individual eye conditions."Rather than asking which surgery is objectively superior, the real question is: Which procedure is right for your unique eyes?"This is the core advice we offer during every consultation. Every patient presents a unique ocular profile including corneal thickness, pupil size, refractive error, and degree of myopia. Furthermore, pain tolerance and comfort levels differ from person to person.Ultimately, personalized care matters more than the surgical title alone. While SMILE Pro may be ideal for patients seeking faster treatment and greater peace of mind, standard SMILE and traditional LASIK also yield outstanding visual outcomes when correctly matched to the patient.The best vision correction procedure is simply the one tailored precisely to your eyes. The team at BGN Eye Clinic Jamsil Lotte Tower remains committed to guiding you toward your safest, clearest vision.BGN Eye Clinic Jamsil Lotte Tower

Why You Should Never Rub Your Eyes When Washing Your Face in the MorningA Guide to Preventing Corneal Damage and Dry Eye Syndrome Hello from BGN Eye Clinic Jamsil Lotte Tower!How many of you head straight to the bathroom sink the moment you wake up? I personally love splashing cold water on my face to wake myself up every morning. However, during consultations, I notice that many people have a habit of rubbing their eyes vigorously while washing up."My eyes feel so stiff in the morning, I instinctively start rubbing them while washing my face.""I feel like I need to give my eyes a good rub before putting in my contact lenses to feel refreshed."We hear statements like these all the time in our examination rooms. But the truth is... rubbing your eyes during your morning wash is far more dangerous than you might think. Today, I will explain why this habit is harmful and share practical, easy-to-follow tips to help you protect your vision.Why Do We Feel the Urge to Rub Our Eyes in the Morning?Everyone has experienced that stiff, dry feeling in their eyes right after waking up. During sleep, tear secretion naturally decreases, causing the surface of the eye to dry out. On top of that, microscopic dust and sleep discharge accumulate around the eyelids overnight, compounding the discomfort.As a result, your hands unconsciously reach for your eyes out of habit. Contact lens wearers experience this morning dryness even more frequently. The real problem is that rubbing it feels soothing in the moment. That false sense of relief makes you do it again and again, until it becomes an everyday habit without you even realizing it.What Happens When You Rub Your Eyes?1. Corneal Scratches and Epithelial DamageThe cornea protecting the front of your eye is incredibly thin (thinner than a single strand of human hair!). Pressing and rubbing your eyes while washing can trap cleansing foam, surface dust, or bacteria against your cornea, causing micro-abrasions. While doing it once or twice may seem harmless, repeated friction can eventually cause blurry vision and sharp light sensitivity.2. Worsening Dry Eye SyndromeYour eyes are already vulnerable and dry when you wake up. Rubbing them breaks down the delicate tear film remaining on the surface, accelerating moisture loss. That momentary feeling of relief is purely a temporary distraction; in reality, it leaves your eyes feeling irritated, stinging, and dry for the rest of the day.3. High Risk of Bacterial InfectionThink about the sweat, dust, and bacteria that accumulate on your hands overnight. If you rub your eyes before properly washing your hands in the morning, you introduce harmful bacteria directly into your eyes. Common complaints like red, itchy eyes often stem from this exact habit, leading to conditions like conjunctivitis or keratitis.4. Spikes in Intraocular Pressure (IOP)Pressing hard on your eyelids causes an immediate spike in intraocular pressure. For individuals with a family history of glaucoma or those at higher risk, this sudden mechanical pressure can place significant stress on the optic nerve. It only takes a few seconds of rubbing to exert unsafe pressure inside the eye structure.5. Risk of KeratoconusChronic eye rubbing can cause the cornea to thin progressively and warp into a cone-like shape, a condition known as keratoconus. This leads to severe visual distortion that cannot be easily corrected with standard glasses, often requiring specialized rigid lenses or surgical intervention down the road.Everyday Situations Where We Unconsciously Rub Our EyesWe often rub our eyes multiple times a day without even realizing it. Though each instance seems minor, the physical irritation builds up over time:Turning off the morning alarm: Pressing hard on the eyelids right after waking up.Washing away water: Firmly rubbing the eyes when water splashes in during a cold wash.Applying or removing makeup: Rubbing the eyelids when product stings or irritates the skin.Fighting off afternoon fatigue: Pressing both hands against the eyes to wake up when drowsy.Handling contact lenses: Rubbing the eyes prior to inserting lenses, which breaks the tear film.A Real Patient Story: A Office Worker in His 20sI remember a male patient in his mid-20s who visited our clinic right after work. His eyes were noticeably bloodshot, and he kept blinking rapidly."My eyes feel extremely dry every morning. I always give them a hard rub before putting in my contact lenses to clear my vision. But lately, no matter how much I rub, my vision stays blurry, and my eyes sting all day long."This is a story we hear all too often. Rubbing the eyes had become an automatic part of his morning routine: wake up, wash face, rub eyes, insert lenses. Upon examination, his tear film was completely unstable, and the surface of his cornea showed micro-friction roughness. Because the area touching his contact lenses was inflamed, inserting lenses only triggered more dryness and stinging, creating a painful cycle.I explained to him, "When contact lens wearers rub their eyes in the morning, it aggravates dryness and creates microscopic scratches on the cornea. Applying a lens over an irritated corneal surface naturally causes significant discomfort." He looked surprised and replied, "I just did it out of habit... I had no idea it was doing this much damage."Expert Advice from Optometrist SubinUse artificial tears first: If your eyes feel stiff in the morning, apply preservative-free artificial tears instead of rubbing.Rinse gently: Do not scrub your eyelids while washing your face; cup water in your hands and gently splash around the eye area.Clean hands before lens insertion: Always wash your hands thoroughly with soap and dry them completely before handling contact lenses.How to Upgrade Your Morning Wash Routine1. Avoid Direct FrictionIf water gets into your eyes while washing, resist the temptation to rub them! Cup clean water in your palms and let it flow gently around your eye area instead.2. Refresh with Artificial TearsIf your eyes feel gritty when you wake up, artificial tears are the answer, not your fingers. A single drop of preservative-free eye drops will make your eyes feel much more comfortable throughout the day.3. Practice Strict Hand Hygiene Before Lens UseHand hygiene is essential. Wash your hands thoroughly with soap and dry them completely with a clean towel before touching your lenses or eyes to prevent bacterial contamination.4. Massage the Surrounding Orbital BoneIf your eyes feel tired, do not press directly on the eyeballs. Instead, lightly press the bony ridge around your eye sockets to relieve tension safely.5. Apply a Warm CompressA 5-minute warm compress in the morning improves blood circulation and helps unblock oil glands in the eyelids, noticeably reducing dry eye symptoms.6. Maintain Indoor HumidityRunning a humidifier or keeping a glass of water near your bed keeps the bedroom air hydrated, preventing severe overnight dryness."Say NO to rubbing your eyes during your morning wash! Gentle care today preserves clear, healthy vision for a lifetime."Corneal abrasions, dry eyes, bacterial infections, elevated IOP, and keratoconus can all stem from a simple eye-rubbing habit. Treating your eyes with care is the single best preventative step you can take.If you want to start your day feeling refreshed, replace eye rubbing with gentle washing and hydrating artificial tears. One small change in your morning habit will protect your eyesight for years to come. Wishing you a clear and healthy day ahead!This has been BGN Eye Clinic Jamsil Lotte Tower.BGN Eye Clinic Jamsil Lotte TowerLotte World Tower, Jamsil-dong, Songpa-gu, Seoul, Republic of Korea

Glare After SMILE LASIK: Is It a Normal Side Effect?Discomfort or a Side Effect? How to Tell the DifferenceHello, this is BGN Eye Clinic Jamsil Lotte Tower Branch.One of the most frequently searched symptoms after undergoing SMILE LASIK is glare or light halos. Seeing light scatter around lamps or streetlights at night can be confusing and worrying. You might naturally wonder whether this is part of the normal recovery process or a surgical complication.While most light smearing after SMILE LASIK is merely a temporary healing response, symptoms exceeding certain criteria may require a detailed examination. Below, we clearly break down how to distinguish temporary discomfort from true complications.Key Causes of Light Smearing After SMILE LASIKAlthough SMILE LASIK is an advanced vision correction procedure with minimal corneal incisions, the cornea and tear film are not fully stabilized immediately following surgery.The main causes of post-operative light smearing include:Tear Film Instability Due to Dry Eyes: Initial post-operative dryness causes light to refract unevenly.Temporary Increase in High-Order Aberrations: A natural phenomenon during the healing process as microscopic corneal refractive irregularities settle.Discrepancy Between Pupil Size and Optical Zone: Particularly noticeable at night when pupils dilate in dark environments.Nighttime light halos tend to be more pronounced in low-light conditions. However, in most cases, these symptoms gradually resolve as your visual system adapts over time.What Qualifies as 'Normal Temporary Discomfort'?If your symptoms match the following characteristics, they are likely part of the normal healing process rather than a permanent complication:1. Occurring Within 1 to 3 Months Post-OpDuring the early stage, the corneal surface is healing and swelling is subsiding. Light halos during this period are a standard physiological response.2. Gradually Subsiding Over TimeThis is the most critical benchmark. If your glare decreases and becomes more manageable after 1 to 2 weeks compared to immediately after surgery, your recovery is on the right track.3. Improvement After Using Artificial TearsIf dryness is the primary driver of the glare, applying a single drop of artificial tears will often clear your vision and noticeably reduce halo intensity.4. Preserved and Sharp Visual AcuityIf lights smear slightly but your overall ability to read text or view objects remains crisp and sharp, there is usually no cause for alarm; simply allow your eyes more time to heal.Red Flags: When to Seek a Detailed ExaminationConversely, if you experience any of the following symptoms, the issue may go beyond temporary discomfort and warrants a professional checkup:Persistence Beyond 3 Months or Worsening Symptoms: If halos show no signs of improvement or get progressively worse long after the initial recovery window, your corneal health requires further evaluation.Accompanied by Decreased Visual Acuity: When light glare is paired with difficulty focusing or persistent overall cloudiness, dry eye syndrome may not be the sole cause.Diplopia (Double Vision): If objects appear doubled or overlapping, you should consult an eye care specialist to rule out an abnormal increase in high-order aberrations or residual astigmatism.Nighttime Glare: How Long Should You Wait?Most light smearing resolves within 1 to 3 months. While recovery times vary based on individual corneal thickness, degree of astigmatism, and pupil size in the dark, the standard timeline is as follows:Within 1 Month Post-Op: Natural healing phase: continue regular monitoring.1 to 3 Months Post-Op: Assess gradual improvement and visual adaptation.Beyond 3 Months: Professional consultation and thorough examination recommended if symptoms persist.Daily Tips to Relieve Light SmearingProper self-care is essential to stabilize your tear film and speed up recovery:Focused Dry Eye Care: Use preservative-free artificial tears frequently. Applying a warm compress with a clean towel also greatly enhances tear film stability.Healthy Daily Habits: Lack of sleep or prolonged smartphone use in dark environments increases eye strain and exacerbates light halos.Night Driving Assistance: If night driving is unavoidable, wearing anti-glare coated glasses can help minimize discomfort during the initial recovery period.Key Summary: Distinguishing Light Smearing SymptomsThe core question is NOT merely whether the symptom exists, but whether it is progressively improving over time.Most instances of light smearing following SMILE LASIK are temporary healing reactions that disappear over time. However, if symptoms persist past 3 months or are accompanied by blurred vision, scheduling a comprehensive exam is the safest course of action.If you experience ongoing discomfort, please do not hesitate to contact the specialists at BGN Eye Clinic Jamsil Lotte Tower Branch for a thorough checkup. We are committed to protecting your clear and sharp vision every step of the way!

How to Prevent Side Effects of Contact Lenses and Wear Them Safely Long-TermHello, this is BGN Eye Clinic Jamsil Lotte Tower Branch.This morning on the subway, I noticed a passenger across from me nodding off to sleep. Feeling tired myself, I nearly drifted off as well. But looking at them, a sudden thought crossed my mind: "I hope they aren't sleeping with their contact lenses in..."Sleeping with contact lenses is one of the single most dangerous habits for eye health. Perhaps predictably, the very first question waiting for me upon arriving at the clinic was: "Doctor, I've been wearing my lenses for a long time... Is my eyes going to be okay?"Patient's First Concern: "Is It Okay if I Wear Lenses for Too Long?"This is one of the most common questions heard during daily consultations.Yesterday, a university student rushed into the examination room right after the door opened. Carrying a backpack over one shoulder, she was slightly out of breath, carrying the clear exhaustion of someone who had been studying for hours.As she sat down, mild redness around her eyes was immediately noticeable. Touching the area around her eyes with her fingertips, she cautiously asked, "I've been wearing my lenses for a long time... Is my eyes going to be okay?"Her expression carried a mix of guilt for exceeding the recommended wear time and genuine anxiety over potential permanent damage. She explained that due to exam season, she had been studying at the library from early morning until late at night, wearing her lenses for over 14 hours continuously.While she felt fine initially, her eyes gradually became dry and scratchy, and text on the page began to blur, leading her to seek medical attention.What Is the Current Condition of Your Eyes?Positioning her comfortably on the chin rest, the corneal and conjunctival surfaces were evaluated using a slit-lamp microscope. As the gentle beam of light illuminated her eye, she blinked momentarily and adjusted her breathing in subtle tension.The examination revealed changes typical of prolonged lens wear. Fortunately, there were no severe abrasions or active inflammation. However, the corneal surface lacked its normal clear luster, appearing slightly hazy. Expanded blood vessels were clearly visible; a classic sign of hyperemic response caused by oxygen deprivation. Additionally, the tear film was broken up irregularly, showing clear evidence of localized dryness.Following the examination, she looked up anxiously. The findings were explained in a calm, reassuring tone:"Fortunately, there is no major structural damage. However, wearing lenses for such extended periods deprives your cornea of necessary oxygen. Over time, this can cause microscopic abrasions, creating entry points for bacteria that could lead to severe infections. Since soft contact lenses have physical limitations regarding oxygen permeability, avoiding prolonged wear is essential."Hearing this, she nodded in relief, though a fleeting look of realization crossed her face. She was already aware that her daily routine posed a risk.Complications Associated with Prolonged Contact Lens WearThe clinical findings were broken down into three primary categories:Corneal Damage Due to Hypoxia (Oxygen Deprivation): Contact lenses act as a physical barrier over the cornea. Soft lenses, despite their high water content, restrict direct oxygen transfer. When the cornea lacks sufficient oxygen, corneal edema (swelling) occurs, leading to sudden episodes of blurred vision.Micro-Abrasions and Bacterial Infections: Extended wear leads to dry eye conditions. Increased friction between a dehydrated lens and the eye surface causes micro-scratches on the corneal epithelium. These tiny abrasions serve as entry portals for pathogens, increasing the risk of contact lens-induced keratitis, which can leave permanent visual deficits.Chronic Dry Eye Syndrome: Prolonged contact lens usage disrupts the natural distribution of the tear film. This results in persistent dryness, ocular fatigue, and difficulty focusing on digital displays or printed materials—a frequent issue for students and office workers.Essential Habits for Safe Contact Lens WearTo maintain corneal integrity and prevent long-term complications, the following guidelines should be strictly adhered to:1. Limit Wear Time to 6–8 Hours DailyThe longer a lens remains on the eye, the more severe the oxygen deficit becomes. Restricting daily wear to a maximum of 6 to 8 hours ensures the cornea receives adequate oxygenation, preventing chronic tissue strain and vascularization.2. Never Sleep in Contact LensesSleeping with lenses in place severely starves the cornea of oxygen, reducing oxygen availability to a fraction of normal levels. This environment drastically elevates the risk of epithelial breakdown and severe microbial infections. Lenses must always be removed prior to sleep.3. Never Reuse Multipurpose Cleaning SolutionsDisinfecting solution should never be reused. Even if the liquid appears clear, bacteria can multiply exponentially within hours. Always discard used solution and fill the lens case with fresh solution for every cycle.4. Replace Lens Cases Every 3 MonthsLens cases can host bacterial biofilms even with regular rinsing. To maintain proper hygiene and minimize infection risks, replace your lens case every 3 months without exception.5. Schedule Regular Ophthalmologic ExaminationsSubclinical corneal changes or early-stage abrasions often occur without immediate pain. Individuals who wear contact lenses regularly should undergo professional eye examinations every 6 to 12 months to monitor corneal health and tear film stability.💡 Summary & Expert Guidance"Eyes do not possess unlimited regenerative capacity. Once structural damage occurs, full recovery can be difficult. Prioritizing correct usage schedules over convenience is essential for long-term vision preservation."Regular eye examinations combined with disciplined hygiene protocols, such as strictly limiting daily wear time, replacing solution daily, and avoiding sleeping in lenses, effectively prevent contact lens-related keratitis, corneal damage, and severe dry eye syndrome.If you experience persistent dryness, redness, or discomfort while wearing contact lenses, visit BGN Eye Clinic Jamsil Lotte Tower Branch for a comprehensive corneal health evaluation.Wishing you clear and healthy vision every day.

Is Wearing Colored Contact Lenses Safe for Eye Health? Differences From Clear Lenses & A Complete Guide to Safe Wear Hello, this is BGN Eye Clinic Jamsil Lotte Tower.When sitting in front of the vanity, there is always that daily dilemma: "Should I go with a pink lip or a nude tone today?" Yet, somehow, most of us end up applying the exact same shade every single day. I am sure I am not the only one, right?In fact, this exact same dynamic applies when choosing contact lenses. Wearing only clear lenses feels a bit plain, but while colored lenses look stunning, they somehow seem to leave our eyes feeling much more fatigued. We constantly find ourselves debating: "Should I go with clear today? Or switch up the vibe with a nice brown tint?"Indeed, many clients who come in for consultations ask variations of these very questions: "I heard colored lenses are worse for your eyes, is that true?" or "What exactly is the difference between them and clear lenses?" The ultimate core factor that creates this difference is oxygen permeability. If you want to protect your eye health, this is a crucial piece of information you absolutely must know. Today, we will break down the structural differences between colored and clear lenses, how those differences affect oxygen permeability, and how you can wear them much more safely.Why is 'Oxygen Permeability' So Vital for Lenses?The cornea of our eye is a unique tissue that contains absolutely no blood vessels. Instead, it absorbs oxygen directly from the surrounding air and receives additional oxygen supply through our tears. Simply put, the cornea breathes through these two primary pathways: air and tears.But what happens when a contact lens covers the cornea? The pathway for oxygen narrows, making it difficult for the cornea to breathe. This lack of oxygen is the exact reason why your eyes feel gritty, dry, and bloodshot when you wear lenses for extended periods.In professional terms, this state is called hypoxia. Moving past simple dryness, chronic hypoxia can lead to more serious complications such as corneal edema (swelling), decreased visual acuity, and corneal neovascularization (the growth of abnormal new blood vessels). This means it is not just a minor issue of having "red eyes," but rather a critical stage that can actively threaten your long-term vision health.Consequently, one of the most vital criteria when choosing lenses is oxygen permeability (Dk/t). To put it simply, this value indicates how well a lens allows your eyes to breathe. The higher this number, the more comfortable your eyes will feel, and the less strain they will experience, even during extended wear.Structural Differences Between Colored and Clear LensesClear lenses are designed purely for vision correction. Because no additional decorations or pigments are added, the lens material itself completely dictates the oxygen permeability. Nowadays, silicone hydrogel materials are widely used, which allow oxygen to pass through efficiently and place far less strain on the eyes. Therefore, if you are someone who needs to wear lenses all day long, clear lenses offer a definitive advantage.On the flip side, the story changes entirely with colored lenses. A cosmetic pigment layer is integrated into the lens to make the iris appear sharper or to alter its color. Typically, the central pupil area is left completely clear while the surrounding area is printed with pigment. This manufacturing process inherently makes the lens slightly thicker and significantly reduces the microscopic pathways through which oxygen can travel. Ultimately, their structure makes a drop in oxygen permeability completely unavoidable compared to clear lenses.To summarize, you can think of a clear lens as a thin, breathable t-shirt, and a colored lens as a beautifully designed, thick outer coat. Just as an outer coat looks stylish but feels stuffy and restricting if worn for too long, colored lenses can heavily exhaust your eyes over extended periods.A College Student’s Case of Redness: Clear vs. Colored LensesLet me share a story of a patient in her 20s who visited our clinic recently. She normally wore clear lenses during the week but always switched to colored lenses on weekends when taking photos with friends. "Clear lenses are so comfortable, but whenever I wear colored lenses, my eyes get incredibly red and irritated," she noted with a worried expression.Looking closely into her routine, her eyes were perfectly fine during weekday lectures. However, on days she wore colored lenses, they began drying out rapidly right after lunch, and severe redness would flare up when she looked in the mirror. Our examinations revealed no major underlying eye diseases; the issue was simply that the pigment layer of the colored lenses lowered oxygen permeability, preventing her eyes from breathing adequately.Following our consultation, the patient adjusted her habits: clear lenses on weekdays, and colored lenses reserved exclusively for weekend gatherings or special occasions. As a result, both her redness and dryness dropped drastically. She returned with a bright smile, saying, "My eyes feel incredibly comfortable now."Best Practices for Safe Colored Lens WearBecause colored lenses naturally possess lower oxygen permeability due to their structure, wearing them for long intervals poses the heaviest strain. Follow these key steps to ensure your eyes remain safe and healthy:Strictly Limit Daily Wear TimeKeep your wear time within 6 to 8 hours max. Cultivating a habit of removing your lenses the moment you step inside your home is highly recommended.Use Preservative-Free Artificial TearsThe ultimate key is applying artificial tears proactively before dryness even sets in. Specifically, opting for preservative-free formulas ensures the surface of your eyes experiences minimal irritation.Use Genuine, Certified Products & Maintain Strict HygieneCheap, uncertified colored lenses flooding the market carry a high risk of pigments bleeding directly onto the eye surface, alongside abysmal oxygen permeability. Always purchase verified, genuine products and replace your lens case frequently.Alternate with Clear LensesWearing colored lenses every single day can overwork your eye health. It is much wiser to alternate your usage: rely on clear lenses for your daily baseline routine, and save colored lenses for special highlight days.Commit to Regular Eye ExamsIf you experience frequent redness or pain, you must never ignore it. Pushing through the discomfort assuming "its just because of the lenses" can quickly escalate into keratitis (corneal inflammation). Ensure you visit an ophthalmologist regularly to check the precise condition of your cornea.Colored Lenses vs. Clear Lenses: The Smart Choice for Vision HealthWhile colored lenses undeniably enhance the aesthetic appeal of your eyes, they remain structurally disadvantaged compared to clear lenses in terms of oxygen permeability. While using them as a brief style accent for special occasions is perfectly fine, clear lenses remain the vastly safer choice for protecting your eye health if you require daily, long-term wear.Never forget that contact lenses are ultimately medical devices placed directly on your living eyes. We highly encourage you to make informed, wise choices so you can successfully balance both beauty and long-term health. I look forward to returning next time with even more valuable insights for your vision care!Best regards,BGN Eye Clinic Jamsil Lotte Tower