World health organization

10 facts about blindness and visual impairment

A man whose eye is being tested with reflective light
WHO/Chris de Bode

Retinal diseases are the main causes of visual impairment in upper-middle- and high-income countries

There is a need to target the exposure to risk factors (smoke, genetic pre-disposition, systemic diseases) and perform regular eye examinations to allow an early diagnosis of the disease, and early treatment to avoid or delay the onset of diminished visual function.

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