title: Avoidable blindness.
abstract: The vast majority of the world's 42 million blind are needlessly impaired. Epidemiologic studies are providing important insights into the cause of cataracts and provision of surgical services; ecologic approaches to the control of trachomatous corneal scarring; treatment and prevention of onchocerciasis; and early diagnosis and treatment of xerophthalmia among others. Continued research and application of existing knowledge can have a dramatic impact on the sight and lives of millions of people.
mesh_terms: D001766:Blindness / Q000209:etiology / Q000517:prevention & control*; D002386:Cataract / Q000453:epidemiology; D002387:Cataract Extraction; D005901:Glaucoma / Q000601:surgery; D006801:Humans; D009855:Onchocerciasis / Q000150:complications / Q000188:drug therapy / Q000517:prevention & control; D014141:Trachoma / Q000517:prevention & control; D014801:Vitamin A / Q000627:therapeutic use; D014802:Vitamin A Deficiency / Q000150:complications; D014985:Xerophthalmia / Q000175:diagnosis / Q000188:drug therapy / Q000209:etiology
chemical_list: D014801:Vitamin A