Unlike optometrists, who are also “eye doctors”, ophthalmologists can perform surgeries in the eyes. Moreover, because they can perform operations on the eyes, they are considered as both medical and surgical specialists. Ophthalmologists diagnose various eye-related diseases such as Cataract, Glaucoma, Macular degeneration, Diabetic retinopathy, dry eyes, Strabismus, Proptosis, Uveitis, Eye tumors, Refractive surgery, and more. There are sub specialties within Ophthalmology to specialize in particular eye diseases.