Optometrists examine the eyes and other parts of the visual system. They also diagnose, and treat visual problems, and manage diseases, injuries, and other disorders of the eyes. They prescribe eyeglasses or contact lenses as needed.Optometrists typically do the following:Perform vision tests and analyze resultsDiagnose sight problems, such as nearsightedness or farsightedness and eye diseases, such as glaucomaPrescribe eyeglasses, contact lenses, and medicationsProvide treatments such as vision therapy or low-vision rehabilitationProvide pre- and post-operative care to patients undergoing eye surgery—for example, examining a patient’s eyes the day after surgeryEvaluate patients for the presence of diseases such as diabetes and refer patients to other healthcare providers as neededPromote eye health by counseling patients, including explaining how to clean and wear contact lensesSome optometrists spend much of their time providing specialized care, particularly if they are working in a group practice with other optometrists or physicians. For example, some optometrists mostly treat patients with only partial sight, a condition known as low vision. Others may focus on treating infants and children.Many optometrists own their practice and may spend more time on general business activities such as hiring employees, ordering supplies, and marketing their business.Optometrists also may work as postsecondary teachers, do research in optometry colleges, or work as consultants in the eye care industry.Optometrists should not be confused with ophthalmologists or dispensing opticians. Ophthalmologists are physicians who perform eye surgery and treat eye disease in addition to examining eyes and prescribing eyeglasses and contact lenses.