Randomized controlled clinical trial. National Eye Institute workshop for ophthalmologists. Standardizing diagnostic procedures.
D000375:Aging; D002386:Cataract / Q000175:diagnosis; D002908:Chronic Disease; D002986:Clinical Trials as Topic; D003930:Diabetic Retinopathy / Q000175:diagnosis; D003933:Diagnosis; D005901:Glaucoma / Q000175:diagnosis; D006801:Humans; D008268:Macular Degeneration / Q000175:diagnosis; D008404:Massachusetts; D008875:Middle Aged; D009887:Ophthalmoscopy; D012107:Research Design; D012168:Retinal Pigments; D014792:Visual Acuity
D012168:Retinal Pigments