There are two available routes for Optometry:
O.D. - Doctor of Optometry
Optometry is a four-year degree culminating in a Doctor of Optometry (O.D.) title. Optometrists perform annual examinations to treat any vision problems, check for abnormalities, and dispense glasses and corrective lenses.
Ophthalmologists must acquire a Doctor of Medicine degree (M.D. or D.O.), and receive more extensive post-graduate education and residencies. Ophthalmologists are the only eye care professionals certified to perform surgery on the eye.