Vision loss

Vision loss means reduced ability to see — from mild blurring to total blindness. It can come on suddenly or slowly over years. India carries a significant share of the world's vision impairment burden, though much of it is avoidable with timely care.

Common causes of vision loss in India

• Uncorrected refractive error — short-sightedness (myopia), long-sightedness (hypermetropia), astigmatism. The single biggest cause of avoidable vision impairment in India, often correctable with spectacles.
• Cataract — clouding of the eye's natural lens with age. India's leading cause of blindness, and highly treatable with surgery. Free and subsidised services are widely available through government eye camps and public hospitals.
• Diabetic retinopathy — damage to retinal blood vessels from long-standing diabetes. Rapidly rising in India.
• Glaucoma — damage to the optic nerve, often from raised eye pressure; causes gradual peripheral vision loss before affecting central vision.
• Age-related macular degeneration (AMD) — affects central vision, usually in people over 50.
• Corneal opacity — scarring from infections (keratitis), injury, or vitamin A deficiency.
• Other — retinal detachment, uveitis, trachoma (still endemic in some parts of India), optic nerve disease, stroke.

When should I get my eyes checked?

• Adults — every 2 years if symptom-free, annually after 40 or if you have diabetes/hypertension
• Children — at school screening, and anytime a parent/teacher notices squinting, head tilting, holding books close, or poor classroom performance
• Anyone with diabetes — at least yearly dilated retinal examination
• Anyone with sudden vision change, floaters, flashes, eye pain, or a red eye with vision loss — same-day urgent review

Preventing avoidable vision loss

• Regular eye check-ups — many causes (cataract, refractive error, glaucoma, diabetic retinopathy) are treatable if caught early
• Control diabetes and blood pressure
• Don't smoke
• Protect eyes with sunglasses (UV protection) and protective eyewear in dusty or hazardous work
• Manage screen time — 20-20-20 rule: every 20 minutes, look at something 20 feet away for 20 seconds

If you have vision loss that cannot be corrected, a range of assistive supports exist — magnifiers, large-print books, screen readers, talking devices, and rehabilitation services. Disability certification under the RPWD Act gives access to government schemes.