Visual Impairment as a Public Health Problem in 2021

Eighty percent of all visual impairment can be prevented or cured by considering the two leading causes in world, i.e., uncorrected refractive error and cataract. Cataracts cause vision loss owing to clouding lens, with age being greatest risk factor. Cataract surgery greatly improve is highly effective. It most commonly performed developed countries. Uncorrected resolved simply wearing proper eyeglasses contact lenses. Although traditionally considered a problem developing countries, now known more common among older people Glaucoma important Japan, accounting for 29% cases. Compared other eye diseases visually impaired population, glaucoma only one that has been increasing both number percentage.