Optometrists

Optometrists, also known as doctors of optometry, or ODs, are the main providers of vision care. They examine people's eyes to diagnose vision problems, such as nearsightedness and farsightedness, and they test patients' depth and color perception and ability to focus and coordinate the eyes. Optometrists may prescribe eyeglasses or contact lenses, or they may provide other treatments, such as vision therapy or low-vision rehabilitation.

From U.S. Bureau of Labor Statistics (www.bls.gov/oco)