Optometrists, or Doctors of Optometry, provide primary vision care. They diagnose and treat vision problems and eye diseases, prescribe contact lenses and glasses, and provide vision therapy. Optometrists can administer prescription drugs, and they also provide pre- and post-operative care to patients who undergo eye surgery.
Ophthalmologists can also perform these functions, but they are also licensed physicians who perform eye surgery. Opticians fit people for eyeglasses, and sometimes for contacts.
Optometrists usually work in general practice, either independently or in a group. They must know how to run an office, including how to keep medical records, make appointments, supervise staff, and order supplies.