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Thin Cornea: Causes, Symptoms, and TreatmentsBangkok Eye Hospital A thin cornea refers to a condition where the corneal thickness is lower than normal, which can affect vision and overall eye health. Causes include natural aging, frequent eye rubbing, genetic disorders, or side effects from previous eye surgeries. Common symptoms include blurry vision, frequent prescription changes, distorted images, and high astigmatism. The cornea plays a vital role in focusing light into the eye. When the cornea thins, it may lead to complications, especially for those considering vision correction surgeries like LASIK. Understanding the causes and symptoms is essential for maintaining long-term vision clarity and preventing further thinning. 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. Patients with thin corneas may not be ideal candidates for LASIK. In such cases, surgeons may recommend alternative procedures such as PRK, ICL, FemtoLASIK, ReLEx SMILE Pro, or NanoLASIK, which preserve more corneal tissue. Does Wearing Contact Lenses Cause Thinning? 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 1. Genetic Conditions Keratoconus is the most common cause, where the cornea gradually thins and bulges outward into a cone shape, leading to irregular astigmatism and blurred vision. 2. Eye Surgery or Injury Procedures like LASIK or PRK can thin the cornea, especially if excessive tissue is removed. Repeated eye injuries or untreated infections 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 thinning. Long-term use of steroid eye drops may also weaken corneal tissue over time. Symptoms of Thin Cornea Corneal thinning often progresses slowly. Key symptoms include: Blurry or distorted vision Frequent changes in prescription High or irregular astigmatism Difficulty focusing or double vision Diagnosis Eye doctors use advanced devices like a Keratometer to measure curvature or Corneal Topography to create a detailed map of the corneal shape. Detailed assessment is essential before undergoing any refractive surgery. Summary Thin cornea is a silent condition that can impact vision. Early detection is crucial. At Bangkok Eye Hospital, our specialists ensure accurate evaluation and personalized treatment planning for your eye health. FAQ: Frequently Asked Questions Q: Can corneal thickness be increased? A: No, corneal thickness cannot naturally increase as it is determined by the cornea’s internal structure. Care focuses on preventing further thinning. Q: What happens if thin cornea is left untreated? A: It may lead to worsening vision, irregular astigmatism, or corneal ectasia. In severe cases, acute hydrops or corneal perforation may occur, leading to permanent vision loss. Q: Can thin cornea be prevented? A: Yes — by avoiding vigorous eye rubbing, maintaining good hygiene, limiting contact lens wear time, and having regular eye checkups. Book an Eye Exam For professional evaluation and personalized eye care, consult our specialists at Bangkok Eye Hospital today. Bangkok Eye Hospital Map 10/989 Soi Prasoet-Manukit 33, Nuan Chan, Bueng Kum, Bangkok 10230 Open in Google Maps Contact Us Chat via LINE 02 511 2111 Open Daily 08:00 - 20:00 | www.bangkokeyehospital.com Published on: May 12, 2026 at 17:23

Having both myopia and farsightedness together refers to a condition where both near and distant vision are unclear, commonly occurring in people with myopia who begin to develop age-related presbyopia. Both myopia and farsightedness can be treated simultaneously with glasses, contact lenses, LASIK surgery, or intraocular lens implantation, depending on an ophthalmologist’s recommendation. The choice of treatment depends on vision prescription, age, corneal thickness, and professional advice from an ophthalmologist. Having both myopia and farsightedness simultaneously is a condition found in some adults, particularly when individuals with myopia begin to develop presbyopia. This causes abnormalities in both near and distance vision, affecting daily activities such as reading, working on screens, or driving. Understanding the causes and treatment options helps patients choose appropriate, safe, and effective eye care solutions.     What Does Having Both Myopia and Farsightedness Mean? Having both myopia and farsightedness means both near and distant vision become unclear. People who already have myopia may use glasses to improve distance vision, but when presbyopia develops with age, those same glasses may no longer provide clear near vision, requiring adjustments or new lenses.   In people with myopia, the issue is mainly due to the eye’s physical structure — either an elongated eyeball or an overly curved cornea — causing incoming light to focus in front of the retina. This results in blurred distance vision and often develops during childhood or adolescence.   Presbyopia, on the other hand, is unrelated to eyeball length. It is a natural age-related condition typically beginning after age 40. The crystalline lens inside the eye gradually loses elasticity and the focusing muscles weaken, reducing the eye’s ability to focus on near objects.   When both conditions occur together, the structural myopia remains unchanged while age-related lens stiffness develops concurrently.   This situation can be challenging: distance vision remains blurry due to existing myopia, while wearing myopic glasses may worsen near vision because the aging lens can no longer adjust focus effectively.   However, individuals with mild myopia (around -1.00 to -2.00 diopters) may sometimes read comfortably without glasses because their natural focal point aligns with reading distance. Once they wear myopic glasses again, near vision blur often returns.     Correction and Treatment Options Treatment focuses on ensuring incoming light accurately focuses on the retina. Options generally fall into three main categories:   1. External Vision Correction Devices Using external devices is a safe and easily adaptable option for those with both myopia and farsightedness.   Progressive Eyeglasses Progressive lenses are currently the most popular option and represent a modern standard for working adults. These seamless lenses gradually change prescription from top to bottom — distance correction at the top, intermediate vision in the middle (e.g., computer use), and near vision at the bottom.   The main advantage is clear vision at all distances without switching glasses. They also lack visible dividing lines, maintaining a youthful appearance. However, some users may need a short adaptation period.   Contact Lenses Multifocal contact lenses function similarly to progressive glasses, incorporating multiple prescriptions in a single lens. They often use concentric ring designs to support both near and distance vision.   The brain adapts by selecting the clearest image automatically. While convenient and glasses-free, sharpness may be slightly reduced compared with eyeglasses, particularly in low light, and adaptation may take time.   Another option is monovision, where one eye is corrected for distance (dominant eye) and the other for near vision. The brain combines both images for functional daily vision.   This approach is often more affordable than multifocal lenses but may slightly reduce depth perception, affecting night driving or 3D perception in some individuals.   A combined approach involves wearing myopia-correcting contact lenses for clear distance vision and using reading glasses only when needed. This provides excellent clarity at lower cost but does not eliminate glasses entirely.   Because fitting contact lenses for this condition is complex, professional evaluation by an ophthalmologist or optometrist is essential.   One drawback may be higher long-term costs and the need for careful lens hygiene.   2. Laser Vision Correction LASIK (Laser-Assisted in Situ Keratomileusis) permanently corrects refractive errors including vision prescriptions such as myopia, hyperopia, and astigmatism. The procedure involves creating a corneal flap, reshaping the cornea with laser energy, and repositioning the flap. Recovery is typically quick, with clearer vision often within 24–48 hours. Temporary dry eyes, glare, or halos at night may occur during adjustment.   It is suitable for individuals wanting to reduce reliance on glasses or contact lenses with adequate corneal thickness. Those with severe dry eyes, chronic eye disease, or unsuitable prescriptions may consider PRK or refractive lens exchange (RLE).   3. Intraocular Lens Implant Surgery RLE (Refractive Lens Exchange) involves replacing the natural lens with an artificial intraocular lens (IOL). It is suitable for individuals with significant combined myopia and farsightedness or presbyopia. Modern IOLs can correct multiple refractive errors simultaneously.     How to Choose the Right Treatment Selecting the best treatment depends not only on visual clarity needs but also on several factors:   Lifestyle and preferences: Glasses or contact lenses suit those avoiding surgery, while LASIK or RLE offer longer-term solutions. Overall eye health: Detailed eye examinations assess corneal thickness, retinal health, and other conditions to determine safe treatment. Cost considerations: Surgical treatments typically cost more upfront than glasses or contact lenses. Expected outcomes: Laser surgery may reduce but not always eliminate the need for reading glasses.     Why Choose LASER VISION Center at Bangkok Eye Hospital? Bangkok Eye Hospital provides comprehensive eye care with advanced technology at the LASER VISION Center and experienced ophthalmologists. Services include accurate diagnosis, treatment for myopia, hyperopia, and other vision problems, along with continuous follow-up care. The hospital emphasizes personalized consultation, appropriate treatment recommendations, and a supportive environment for safe, comprehensive eye care.   Summary Combined myopia and farsightedness occur when individuals with myopia develop age-related presbyopia, causing both near and distance vision difficulties. Existing myopic glasses may improve distance vision but not near vision. Correction options include glasses, contact lenses, LASIK, or intraocular lens surgery. The best choice depends on prescription, age, eye health, and lifestyle. For comprehensive diagnosis and treatment, visit Bangkok Eye Hospital, equipped with advanced technology, specialists, and dedicated eye care centers.   Related Articles Understanding Vision Prescriptions and Their Impact on Daily Life PRK vs LASIK: Eye Surgery Techniques You Should Know Before Deciding FemtoLASIK: Advanced, Safe, and Precise Vision Correction Technology Frequently Asked Questions (FAQ) People with both myopia and farsightedness often have questions about symptoms and treatment options. Here are common FAQs:   Can LASIK treat both myopia and farsightedness? Yes, LASIK can treat both conditions, but suitability depends on corneal thickness and eye health. Some patients may require alternative options such as intraocular lenses for optimal safety and results.   How should contact lenses be chosen? People with combined refractive errors may use multifocal or progressive contact lenses designed for multiple focusing distances. Consultation with an ophthalmologist or contact lens specialist is recommended for proper selection.   What are the symptoms? Symptoms include blurred near and distance vision. Individuals who previously used myopic glasses may find distance vision clear but struggle with reading or phone use due to presbyopia, requiring adjustments in eyewear.

Preparing for LASIK Surgery: What You Should Know When considering LASIK surgery, it's vital to follow the guidance of an ophthalmologist. The ophthalmologist will assess your eye condition and determine the most suitable LASIK procedure for you. This decision should be a collaborative effort between the ophthalmologist and the patient. With advancements in technology, LASIK procedures are now less daunting, and the recovery time is shorter, enabling you to return to your regular activities within just a few days.   Preparation Before LASIK Surgery   Avoid wearing soft contact lenses in the days leading up to the eye evaluation and surgery, ideally for 3-7 days. For hard or semi-hard contact lenses, refrain from using them for 7-14 days before the evaluation and surgery. This step ensures more accurate eye measurements. Certain medications that affect the corneal and eye surface, such as Roaccutane (an acne medication), should not be used prior to the eye evaluation and surgery. These medications may lead to inaccurate measurements. Ensure your hair is clean before the surgery. Avoid wearing makeup and any type of perfume on the day of the LASIK procedure as it could affect the laser system. On the day of the LASIK surgery, wear comfortable clothing with front buttons for ease of dressing and undressing.   **During both the eye evaluation and the LASIK procedure, it is advisable to have a relative or friend accompany you. During the evaluation, eye dilation is performed to examine the optic nerve and overall eye health. This temporarily increases light sensitivity, but it gradually diminishes after the medication wears off (typically in about 4-6 hours). On the day of the LASIK procedure, a protective eye shield will be used to prevent unintentional eye rubbing after the surgery. This shield has small openings for visibility and is removed the following day. Trust the experienced team of eye specialists at Laser Vision, who are well-versed in corneal and refractive eye surgery, particularly with their extensive experience and up-to-date technology.   For appointments and online consultations, please call 02-511-2111 or 02-939-6006.  

Why Is the Pre-LASIK Eye Examination Important, and Why Does It Take Up to 3 Hours? The significance of a comprehensive pre-LASIK eye examination lies in ensuring the best possible outcomes for LASIK patients. But why does this process take up to 3 hours? At Laser Vision, our commitment to delivering top-tier LASIK treatment involves an intricate evaluation of patients' eye conditions, utilizing state-of-the-art tools to assess vision and provide critical data for diagnosis, procedure planning, and the selection of the most suitable LASIK treatment method for achieving the clearest vision.   This meticulous process comprises four essential steps:   Step 1: Patient History To initiate the LASIK journey, our medical team at Laser Vision requests patients to complete forms and provide their medical history. This information helps determine if patients are taking any medications or have a history of specific medical conditions that could affect or contraindicate LASIK surgery. This initial assessment aids in evaluating whether patients should undergo a comprehensive eye examination for LASIK. This step typically takes 10-20 minutes.   Step 2: In-Depth Eye Assessment The process commences with a baseline visual acuity measurement using an Auto Refractometer, assessing eye pressure through IOP measurements using an air puff, analyzing corneal curvature and thickness with the Pentacam machine, and evaluating eye rigidity with the Corvis instrument. Following these assessments, an optometrist examines the patient's visual capabilities. In some cases, patients may need to try on corrective glasses to simulate the effects of the intended LASIK correction, especially if they have both myopia and hyperopia. The duration of these steps varies, with each taking 30-60 minutes, contingent on individual circumstances.   Step 3: Detailed Eye Assessment After Pupillary Dilation Subsequently, the staff revisits all previously recorded measurements to make before-and-after comparisons following pupillary dilation, enabling a more thorough assessment of potential changes. This step entails a repeat of the measurements conducted in Step 2.   Step 4: Consultation with the Ophthalmologist In the final step, patients meet with an experienced ophthalmologist. Employing a specialized microscope, the ophthalmologist examines overall eye health, both internally and externally. Subsequently, they elucidate the patient's current visual status and eye health. The ophthalmologist discusses the anticipated post-LASIK vision, as well as any constraints associated with each specific LASIK procedure type. Furthermore, the ophthalmologist inquires about the patient's lifestyle and provides post-operative care recommendations. This comprehensive consultation ensures patients gain a clear understanding of the LASIK procedure, paving the way for optimal results.   Laser Vision's comprehensive pre-LASIK examination process is designed to assure our patients of professional, high-quality service, convenience, and superior treatment outcomes. Should you have inquiries or require additional information, please don't hesitate to reach out to us at 02-511-2111 or 02-939-6006.