World health organization

10 facts about blindness and visual impairment

A mirror reflects a man trying on glasses
WHO/Chris de Bode

An estimated 120 million are visually impaired because of uncorrected refractive errors

Refractive errors (far and near sightedness) are among the simplest to correct cases of visual impairment; almost all of them can be corrected and normal vision can be restored with eyeglasses, contact lenses or refractive surgery.

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