Global eye health and preventable blindness

Why global eye health matters

In high-income countries, cataracts, glaucoma and macular disease dominate. In many regions, childhood blindness and corneal scarring from infection and malnutrition remain major challenges. The same principles apply everywhere: find disease early and treat before the retina or cornea is permanently damaged.

WHO priority conditions on this site

Our condition library includes plain-language guides aligned with WHO and NHS sources. Explore these for detail rather than duplicating full programme manuals here.

• Trachoma — infection scarring eyelids inward; SAFE strategy with surgery, antibiotics, face washing and water
• Onchocerciasis — river blindness from black-fly spread worm disease; community ivermectin programmes
• Vitamin A deficiency — xerophthalmia and childhood night blindness; supplementation and diet
• Leprosy-related eye disease — nerve damage causing dry, exposed corneas; lifelong eye protection
• Cysticercosis — pork tapeworm larvae can reach the eye in endemic areas; hygiene and thorough cooking reduce risk
• Retinopathy of prematurity — screening and laser or injections for premature babies

What actually prevents blindness

Prevention mixes public health and individual care: mass drug administration, vitamin supplementation, trichiasis surgery, neonatal ROP screening, plus everyday access to glasses, diabetic eye screening and cataract surgery as countries build capacity.

If you live far from endemic areas

These topics still build credibility and context for donors, clinicians and travellers. Short tourist visits to endemic regions carry very low risk for trachoma or river blindness, but long-term aid workers should follow occupational health advice. Malnutrition-related vitamin A eye disease can rarely appear anywhere with severe deficiency. See our regional guides for Indonesia and Latin America for curated links.