Prevention of blindness: the current focus.
D001766:Blindness / Q000517:prevention & control*; D002386:Cataract / Q000517:prevention & control; D003906:Developing Countries; D006801:Humans; D009855:Onchocerciasis / Q000517:prevention & control; D014141:Trachoma / Q000517:prevention & control; D014802:Vitamin A Deficiency / Q000517:prevention & control