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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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Hordeolum (Stye): Causes, Symptoms, and Treatment | Bangkok Eye Hospital

Understanding Hordeolum (Stye) A hordeolum, commonly known as a stye, is a red, swollen lump that forms on the edge of the eyelid due to a bacterial infection in an oil gland or hair follicle. Although usually harmless, styes can cause discomfort and temporary vision obstruction. At Bangkok Eye Hospital, we provide effective treatments to alleviate symptoms and prevent recurrence. Common Causes of Hordeolum What Triggers a Stye? Bacterial Infection – Staphylococcus bacteria commonly cause styes. Blocked Oil Glands – Clogged meibomian glands can lead to infection. Poor Eyelid Hygiene – Failing to clean eyelids properly increases the risk. Frequent Eye Touching – Introducing bacteria to the eyelids can trigger infections. Use of Contaminated Makeup – Old or shared cosmetics can harbor bacteria. Who Is at Risk? Individuals with chronic blepharitis (eyelid inflammation). People with a history of recurrent styes. Those with poor eye hygiene or frequent eye rubbing. Contact lens wearers who do not follow proper lens care. Symptoms of Hordeolum Painful, swollen lump near the edge of the eyelid. Redness and tenderness around the affected area. Pus-filled bump that may drain on its own. Watery eyes and increased sensitivity to light. A feeling of something in the eye. Diagnosis and Treatment Options How Is a Stye Diagnosed? Physical Examination – Ophthalmologists inspect the eyelid to confirm the diagnosis. Medical History Review – Identifying recurrent infections or underlying conditions. Eyelid Culture (if needed) – In rare cases, tests may be performed for persistent infections. Treatment for Hordeolum Warm Compresses – Applying a warm cloth helps open blocked glands. Antibiotic Ointments or Drops – Used for bacterial infections. Proper Eyelid Hygiene – Regular cleaning to prevent further infections. Medical Drainage (if needed) – For persistent or large styes. Avoid Squeezing – Letting the stye heal naturally prevents complications. Preventing Styes Maintain good eyelid hygiene by regularly washing the eyelids. Avoid touching or rubbing your eyes with unclean hands. Replace old or contaminated eye makeup to prevent bacterial buildup. Clean contact lenses properly and avoid wearing them when experiencing an eye infection. Address underlying eyelid conditions such as blepharitis or dry eye. Why Choose Bangkok Eye Hospital for Stye Treatment? Experienced Ophthalmologists with expertise in eyelid infections. Advanced Diagnostic Tools for accurate assessments. Personalized Treatment Plans based on individual needs. State-of-the-Art Facilities ensuring safe and effective care. Schedule an Appointment Today If you have a stye that is persistent or causing discomfort, contact Bangkok Eye Hospital for expert diagnosis and treatment.
Retina Center

Color Blindness | Bangkok Eye Hospital

Color Blindness | Bangkok Eye Hospital Meta Description: Learn about color blindness, its causes, symptoms, and treatment options at Bangkok Eye Hospital. Get expert advice on diagnosis and vision solutions. Understanding Color Blindness Color blindness, or color vision deficiency, is a condition where individuals have difficulty distinguishing certain colors. It is usually inherited but can also result from eye diseases, aging, or injury. At Bangkok Eye Hospital, we provide advanced diagnostics and support for those with color vision deficiencies. Causes and Risk Factors What Causes Color Blindness? Genetic Inheritance – Most cases are inherited and affect males more frequently. Eye Diseases – Conditions like glaucoma and macular degeneration can impact color perception. Aging – The ability to distinguish colors may decline with age. Medications and Chemicals – Certain drugs and chemicals can lead to color vision impairment. Eye or Brain Injury – Damage to the retina or optic nerve can affect color perception. Who is at Risk? Individuals with a family history of color blindness. People with eye conditions such as cataracts or optic nerve disorders. Those exposed to toxic chemicals in certain work environments. Older adults experiencing age-related vision changes. Symptoms of Color Blindness Difficulty distinguishing red and green (most common type). Confusing blue and yellow hues. Seeing only shades of gray (very rare). Struggles with color-dependent tasks, such as reading maps or selecting clothing. Diagnosis and Treatment Options How Is Color Blindness Diagnosed? Ishihara Color Test – A common screening tool for red-green color deficiency. Anomaloscope Test – Measures the ability to match different shades of color. Electroretinography (ERG) – Assesses how the retina responds to light and color. Can Color Blindness Be Treated? While there is no cure for inherited color blindness, there are solutions to help individuals manage the condition: Color-corrective glasses and contact lenses – Help enhance color differentiation. Specialized apps and software – Assist with color recognition in daily tasks. Adaptive strategies – Learning to rely on brightness and texture instead of color cues. Treatment for underlying conditions – If color blindness is caused by disease or medication, addressing the root issue may improve vision. Living with Color Blindness Use high-contrast labels and markings for better differentiation. Rely on patterns and textures rather than colors when sorting objects. Utilize digital tools that adjust color settings for accessibility. Seek professional advice to explore vision aids and training techniques. Why Choose Bangkok Eye Hospital for Color Blindness Diagnosis & Management? Expert Ophthalmologists – Specialists in vision disorders and diagnostics. State-of-the-Art Testing Facilities – Accurate assessments for color vision deficiencies. Personalized Vision Solutions – Adaptive strategies to improve daily function. Comprehensive Eye Care – Addressing overall eye health beyond color vision. Schedule an Eye Exam Today If you suspect you have color blindness or experience changes in color vision, consult our specialists at Bangkok Eye Hospital for expert guidance and solutions.
Laser Vision LASIK Center

Can Reading Vision (Presbyopia) Be Corrected After LASIK for Nearsightedness (Myopia)?

Can Reading Vision (Presbyopia) Be Corrected After LASIK for Nearsightedness (Myopia)? Presbyopia is a common vision condition that typically becomes more noticeable with age. It results from changes in the eye's lens and ciliary muscles, making it challenging to focus on close-up objects.   For individuals who have previously undergone LASIK to correct short-sightedness (myopia) and later develop Presbyopia, there are options for correction.   NV LASIK for Presbyopia: NV LASIK is a surgical procedure that can enhance vision for both near and distant objects. It can be an effective solution for individuals experiencing Presbyopia after LASIK for myopia. The procedure can provide clear vision in one eye for near vision and the other for distance vision. This approach addresses the change in vision due to aging, which affects the eye's ability to focus on nearby objects. The duration of the effect can vary from 3 to 5 years, depending on individual eye conditions. Refractive Lens Exchange (RLE) for Presbyopia: RLE is another option to correct Presbyopia after LASIK for myopia. This surgical procedure involves removing the eye's natural lens and replacing it with an artificial lens. By replacing the lens, the eye's focusing power can be adjusted to correct hyperopia.   It's important to note that there can be misconceptions about presbyopia and how it interacts with other refractive errors. For example, some individuals believe that myopia will revert to normal vision as they age.  In summary, it is possible to treat presbyopia after LASIK for myopia using surgical procedures like NV LASIK or RLE, depending on the individual's specific condition and needs. These treatments can help individuals achieve clear vision for both near and distant objects.   ** In reality, presbyopia is a separate condition that results from changes in the eye, particularly the weakening of the eye's focusing muscles. While it might improve near vision slightly, it doesn't restore normal vision.   **For individuals who have presbyopia alongside uncorrected short-sightedness, this can lead to difficulties with both near and distant vision, especially as they reach their 40s. In such cases, it's essential to consult with an eye specialist to explore corrective options.
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