Career of the Day: OptometristOptometrists examine the eyes and other parts of the body related to vision. They also diagnose, treat, and manage diseases, injuries, and other disorders of the eyes. They prescribe eyeglasses or contact lenses as needed. Optometrists must complete a Doctor of Optometry program and get a state license. Doctor of Optometry programs take 4 years to complete after earning a four-year undergraduate degree.