Ophthalmologists treat a variety of diseases and conditions of the eye, including the following: - - Cataracts - - Corneal and external surface disease - - Diabetic retinopathy - - Eye injuries - - Glaucoma - - Macular degeneration - - Nearsightedness, farsightedness, and astigmatism - - Neuro-ophthalmology - - Retinal and viterous diseases - - Strabismus