[Main causes of blindness in the world].
D001766:Blindness / Q000209:etiology*; D002386:Cataract / Q000150:complications*; D006801:Humans; D009855:Onchocerciasis / Q000150:complications*; D014141:Trachoma / Q000150:complications*; D014985:Xerophthalmia / Q000150:complications*
Causas principais da cegueira no mundo.