The World Health Organization and the prevention of blindness.
D001766:Blindness / Q000209:etiology / Q000517:prevention & control*; D005381:Financing, Organized; D006801:Humans; D007391:International Cooperation; D009938:Organizations; D014141:Trachoma / Q000517:prevention & control; D014944:World Health Organization; D014985:Xerophthalmia / Q000517:prevention & control