မျက်လုံး ကျန်းမာရေး : #Dry Eyes

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What Is Thin Cornea? Causes, Symptoms, and Eye Care Tips

A thin cornea refers to a condition where the cornea—the clear, dome-shaped front layer of the eye—has a thickness lower than normal, which can affect vision and overall eye health. This condition may result from various causes such as natural aging, frequent eye rubbing, genetic disorders, or side effects from eye surgeries like LASIK. Common symptoms include blurry vision, frequent changes in prescription, distorted images, and unusually high astigmatism.   Understanding the Cornea The cornea is the transparent, curved layer covering the front part of the eye. It helps focus light into the eye for clear vision and serves as a protective barrier against dust and germs. Normally, corneal thickness ranges between 520–550 microns, but it may thin with age.   What Is a Thin Cornea? A thin cornea is typically defined as a corneal thickness of less than 500 microns (0.5 mm). It is not necessarily a disease and often requires no treatment. However, thin corneas can affect certain diagnoses—such as glaucoma—since intraocular pressure readings may appear lower than actual values. Corneal thickness also plays an important role in refractive surgery decisions. For example, patients with thin corneas and high refractive errors (nearsightedness or astigmatism) may not be ideal candidates for LASIK, as the remaining corneal tissue after surgery might be too thin. This could increase the risk of complications like keratoconus or corneal ectasia. In such cases, ophthalmologists may recommend alternative procedures such as PRK, ICL, FemtoLASIK, ReLEx SMILE Pro, or NanoLASIK, which preserve more corneal tissue. Therefore, detailed corneal thickness assessment is essential before undergoing LASIK to ensure safe and effective outcomes.   Does Wearing Contact Lenses Cause Thinning of the Cornea? Generally, wearing contact lenses correctly does not thin the cornea. However, prolonged use without proper cleaning or rest may lead to oxygen deprivation or corneal infections, which can gradually weaken or thin corneal tissue.   Causes of Thin Cornea There are several factors that can lead to corneal thinning: 1. Genetic Conditions Keratoconus: The most common cause, where the cornea gradually thins and bulges outward into a cone shape, leading to irregular astigmatism and blurred vision. It usually appears during the teenage years to early adulthood. Corneal Dystrophies: Such as Pellucid Marginal Degeneration (PMD), where thinning occurs in the lower peripheral cornea. 2. Eye Surgery or Injury Procedures like LASIK or PRK can thin the cornea, especially if excessive corneal tissue is removed. Repeated eye injuries or untreated infections (e.g., corneal ulcers, keratitis) can also cause thinning due to tissue damage. 3. Systemic Diseases and Medication Autoimmune diseases such as Rheumatoid Arthritis or SLE can cause chronic inflammation, leading to corneal thinning.Long-term use of steroid eye drops may also weaken corneal tissue over time.   Symptoms of Thin Cornea Corneal thinning often progresses slowly and may not show early signs. Key symptoms include: Blurry or distorted vision Frequent changes in prescription High or irregular astigmatism Difficulty focusing or double vision   Diagnosis Thin cornea is often detected during pre-LASIK evaluations.Eye doctors use devices like: Keratometer: Measures corneal curvature and astigmatism. Corneal Topography: Creates a detailed map of corneal thickness and shape. Tomographic Biomechanical Index (TBI): Evaluates corneal strength and risk of ectasia. While early symptoms can hint at the condition, only a comprehensive eye exam by an ophthalmologist can confirm it.   Summary Thin cornea is a silent condition that can significantly impact vision if left untreated. Early detection—especially before refractive surgery—is crucial.At Bangkok Eye Hospital, advanced diagnostic tools and experienced specialists ensure accurate corneal thickness evaluation and personalized treatment planning to maintain long-term eye health.     FAQ: Frequently Asked Questions About Thin Cornea 1. Can corneal thickness be increased?No, corneal thickness cannot naturally increase as it is determined by the cornea’s internal structure. 2. What happens if thin cornea is left untreated?It may lead to worsening blurred vision, irregular astigmatism, or even corneal ectasia. In severe cases, acute hydrops or corneal perforation may occur, leading to permanent vision loss if untreated. 3. Can thin cornea be prevented?Yes — by avoiding vigorous eye rubbing, maintaining good eye hygiene, limiting contact lens wear time, and having regular eye checkups, especially if there is a family history of corneal diseases.
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Laser Vision LASIK Center

How to Care for Your Eyes After LASIK Surgery

How to Care for Your Eyes After LASIK Surgery After undergoing LASIK surgery, proper eye care is essential to ensure a quick recovery. With the use of cutting-edge technology like NanoRelex and NanoLASIK from Switzerland, which employ low-energy lasers, post-LASIK side effects have been significantly minimized. Laser Vision, has been providing over 25 years of experience in LASIK procedures, guarantees a precise and safe process to promote clear and healthy eyes.   Dealing with Initial Post-LASIK Temporary Side Effects: After LASIK, patients may encounter short-term side effects that vary among individuals. Common early side effects including: Eye Irritation: Often occurring within the initial 24 hours after LASIK, this can be mitigated by getting sufficient rest and using cold compresses or prescribed eye drops. Blurry Vision: Typically experienced during the first week, this is attributed to dry eyes resulting from the LASIK procedure. Vision gradually improves as the cornea heals. Nighttime Glare: This may present as starbursts or halos but is usually temporary, diminishing as the cornea smooths over time. If night driving is affected, it's advisable to avoid it temporarily. Dry Eyes: LASIK can temporarily reduce tear production, leading to dry eyes. The discomfort can be relieved with artificial tears, and it usually improves with time.   Addressing Other Concerns: Should you encounter any of the following issues, it is crucial to seek immediate specialist assistance: Eye Pain or Severe Irritation Increased Swelling or Redness of the Eyes Beyond the First Day Sudden Vision Loss or Abnormal Eye Discharge Any Eye Injury Following LASIK Surgery   Conclusion: Your vision is a valuable asset, and after LASIK, it demands careful care and attention. Opting for a reputable LASIK center such as Laser Vision, known for advanced technology, standardized procedures, and extensive experience, all of which is vital to ensure a full and successful recovery.  
Laser Vision LASIK Center

All About Tears

All About Tears Natural tears, produced by our tear glands, serve several crucial functions:   Moistening the cornea and conjunctiva, providing essential hydration. Smoothing the cornea's surface for clear vision by maintaining its optical properties. Supplying nutrients and oxygen to the cornea while removing waste products. Containing mild antimicrobial components to prevent eye infections.   Natural tears play a significant role in maintaining eye comfort and visual clarity. When our natural tears fail to keep our eyes adequately lubricated, a condition known as "dry eye" can occur, leading to discomfort, redness, itching, and other eye-related issues.   Artificial Tears   Artificial tears are products designed to replace or supplement natural tears in individuals with inadequate tear production or experiencing dry eye syndrome. They are used to lubricate and hydrate the cornea, relieving discomfort and irritation caused by wind and glare.   Artificial tears come in two main types:   Preservative-Free Artificial Tears: These are usually single-use vials or unit-dose containers. They lack preservatives and are recommended for those with sensitive eyes or those who need to use them frequently. Artificial Tears with Preservatives: These come in multi-dose bottles. They contain preservatives that help prolong the product's shelf life but may be less suitable for individuals with sensitive eyes. They can generally be used up to five times a day.   Both types of artificial tears are available in liquid, gel, or ointment forms. The choice of artificial tears depends on the severity of dry eye symptoms and an individual's specific needs.   Using Artificial Tears   Wash Your Hands: Clean your hands thoroughly before applying artificial tears. Shake the Bottle (if necessary): Some products may require shaking before use. Follow the instructions on the label. Tilt Your Head Back or Lie Down: Look upward or lie down with your head tilted back. Gently Pull Down the Lower Eyelid: Using one hand, pull down the lower eyelid to create a small pocket. Apply the Drops: Use your other hand to apply the drops into the pocket formed by the lower eyelid, avoiding contact with the eye's surface. Close Your Eyes Gently: Close your eyes gently for at least 30 seconds after applying the drops. This helps distribute the artificial tears across the eye's surface. Blot Excess Liquid: If necessary, blot any excess liquid with a clean tissue.   Storing Artificial Tears Store artificial tears in a cool place with a temperature below 30 degrees Celsius (86 degrees Fahrenheit). Do not use artificial tears if the color or clarity of the solution changes. Do not use artificial tears if they become cloudy.   Frequently Asked Questions Question: Is it necessary for everyone to use artificial tears? Answer: Artificial tears are a type of eye drop designed to provide relief and moisture to the eyes. They are often used by individuals with dry eye symptoms or those who experience discomfort or irritation in their eyes. If you are experiencing such symptoms, artificial tears can help provide relief and comfort.   Question: Who should use artificial tears? Answer: People who may benefit from using artificial tears include those with dry eye symptoms, older individuals (as tear production may decrease with age), women going through menopause, and those who work extensively with computers. It's important to consult with an eye care professional for personalized advice.   Question: How often can artificial tears be used? Answer: For most users, artificial tears can be used up to four to five times a day. However, the frequency of use may vary depending on individual needs and the specific product. Consult with a healthcare professional for guidance tailored to your situation.   Question: Can artificial tears be used for LASIK recovery? Answer: Yes, artificial tears are often recommended during the initial recovery period after LASIK surgery. They can help alleviate dry eye symptoms that may occur during the first 3 to 6 months post-surgery (in most cases only 1-2 months). Your eye surgeon will provide specific instructions on their use.
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