இந்தப் பக்கத்தின் விரிவான மருத்துவத் தகவல் தற்போது ஆங்கிலத்தில் உள்ளது — தமிழ் மொழிபெயர்ப்பு மருத்துவர் சரிபார்ப்புடன் விரைவில் வரும்.
Refractive errors happen when the shape of your eye doesn't bend light correctly, so images don't focus precisely on the retina. It's not a disease — just a mismatch between the eye's shape and its focusing power. The three main types are myopia (nearsightedness), hyperopia (farsightedness), and astigmatism.
Symptoms
- Blurred distance vision (myopia) or near vision (hyperopia)
- Blurred/distorted vision at all distances (astigmatism)
- Squinting to see clearly
- Headaches after reading or close work
- Eye strain
- Children: sitting close to the TV, holding books close, trouble seeing the board
Causes & risk factors
- Family history
- Eyeball too long (myopia) or too short (hyperopia)
- Irregularly curved cornea (astigmatism)
- Extended near work with limited outdoor time (childhood myopia)
- Age-related near-focus changes (presbyopia)
Diagnosis
- Visual acuity test (eye chart)
- Refraction test
- Autorefractor or retinoscopy
- Corneal topography for astigmatism when needed
Treatment options
- Prescription eyeglasses
- Contact lenses, including toric for astigmatism
- Laser vision correction (LASIK, PRK) for suitable adults
- Myopia-control strategies for children — specialty lenses, low-dose atropine drops, more outdoor time
- Regular exams to update prescriptions
When to seek urgent care
Not an emergency on their own, but sudden severe blurring, double vision, or vision loss should be checked urgently as signs of a different problem.
Frequently asked questions
Can refractive errors be prevented?
Not always, since heredity plays a large role — but more outdoor time and regular breaks from near work are linked to lower myopia risk in children.
Does wearing glasses make eyes "weaker"?
No — this is a myth. Glasses correct focus; they don't weaken the eyes or worsen the underlying error.
Is laser surgery a permanent fix?
It reshapes the cornea and results are typically long-lasting, but it doesn't stop age-related changes like presbyopia or cataracts developing later.
எங்களைச் சந்திக்கத் தயாரா?
முன்பதிவு பிரிவை அழைக்கவும் அல்லது ஆன்லைனில் பதிவு செய்யவும் — நேரத்தை தொலைபேசியில் உறுதிப்படுத்துவோம்.
Sources consulted: National Eye Institute — Refractive Errors . General medical information — not a substitute for professional diagnosis. Content pending final medical review by BSEH doctors before publish.
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