Ophthalmologists are physicians who specialize in eye care and treatment of eye diseases. They perform surgeries such as cataract removal and treat conditions like glaucoma and retinal problems. To become an ophthalmologist requires a bachelor's degree, 4 years of medical school, a year of general medical internship, and 3-4 years of residency training in ophthalmology. Ophthalmologists are licensed by their state and many obtain board certification in their specialty. They have moderate work hours and a median salary of $248,500. Demand for ophthalmologists is expected to increase with the aging population and greater use of corrective eye surgeries.