Amazonian ophthalmology.
D000328:Adult; D000368:Aged; D002387:Cataract Extraction; D005139:Eyeglasses; D015812:Glaucoma, Angle-Closure / Q000601:surgery*; D006780:Hospitals, Rural; D006801:Humans; D007199:Indians, South American; D008297:Male; D010568:Peru; D011625:Pterygium / Q000601:surgery*