World health organization

10 facts on the state of global health

A woman's eyes are examined by a health worker in Kazakhstan.
WHO/Christopher Black

Hearing loss, vision problems and mental disorders are the most common causes of disability

These disorders can affect people's lives and livelihoods, but many are easily treatable and some are preventable. Improved access to interventions such as hearing aids, corrective eyeglasses and cataract surgery can make a big difference to helping people live productively.

© WHO. All rights reserved.