Ophthalmologists are physicians who specialize in treating diseases and defects of the eyes. They perform surgeries like cataract removal and treat conditions such as glaucoma and retinal problems. To become an ophthalmologist requires a bachelor's degree, 4 years of medical school, a one-year internship, and 3-4 years of residency training in eye care. Ophthalmologists are licensed by their state and often board certified. They have moderate workloads, flexible schedules, and a median salary of $248,500. Demand for ophthalmologists is expected to increase with the aging population and preference for corrective eye surgeries.