Opticians fit, supply, and adjust eyeglasses and contact lenses which have been prescribed by an ophthalmologist or optometrist. They cannot examine or test the eyes, or prescribe glasses or drugs. Opticians are licensed in 22 states and may have formal training. Traditionally, most opticians are trained on the job. They can prescribe medication and counsel patients, as well as perform diagnostic tests to determine if there are physical problems.
Psychologists counsel people through individual, group, or family therapy.
In addition to giving medicine, administering treatments, and educating patients, R.N.'s also work in doctors' offices, clinics, and community health agencies. They perform physical examinations and diagnostic tests, counsel patients, and develop treatment programs. Nurse practitioners may work independently, such as in rural clinics, or may be staff members at hospitals and other health facilities. They are educated in a number of specialties, including gerontological nursing. They also assist physicians and registered nurses.