They are specially trained to measure the powers of vision and examine the eyes. Optometrists can prescribe eyeglasses, contacts, and other optical wear, such as low-vision devices. Most orthoptists and opticians receive more graduate training after college. Orthoptists are certified allied health professionals who work with ophthalmologists and optometrists to measure the alignment of eyes. Opticians fill spectacle prescriptions and help fit patients for glasses.
Opticians also make corrective lenses.