Doctors of Optometry (O.D.s/optometrists) are the independent primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye.
An ophthalmologist is a surgical specialist who generally has a bachelor's degree, and 4 years of medical school followed by a residency where he/she is trained in eye surgery and eye disease. Ophthalmologists mainly perform surgery and treat diseases of the eye and surrounding structures, but may also prescribe glasses, and contact lenses.
Opticians are skilled craftsmen who manufacture lenses and optical devices. They fit, supply, repair and adjust devices that have been prescribed by an optometrist or ophthalmologist. They cannot prescribe glasses, contact lenses, or drugs.