Optometrists are primary eye care physicians who perform eye exams to check for vision problems and eye diseases. They prescribe eyeglasses, contact lenses, and treat minor eye conditions. To become an optometrist requires 4 years of undergraduate study, 4 years of optometry school including classroom and clinical training, and passing board exams. Optometrists work in a variety of settings like retail offices, hospitals, private practice, and group practices.