Ophthalmology in developing countries.
D001766:Blindness / Q000517:prevention & control*; D002387:Cataract Extraction; D003320:Corneal Ulcer / Q000517:prevention & control; D003906:Developing Countries; D005128:Eye Diseases / Q000175:diagnosis / Q000188:drug therapy; D005139:Eyeglasses; D005901:Glaucoma / Q000175:diagnosis; D006801:Humans; D009855:Onchocerciasis / Q000517:prevention & control; D009885:Ophthalmology / Q000295:instrumentation; D013525:Surgical Instruments; D014141:Trachoma / Q000517:prevention & control