Do you get confused or wonder what the difference is between an OD, MD, and DO ? An excellent website describing  the Doctor of Optometry (OD) profession and education can be found at the American Optometric Association's site: www.aoa.org.  Also, the University of Houston College of Optometry's web site www.opt.uh.edu describes in detail the rigorous training/education involved in the optometric program. ( By the way, an MD is a Doctor of Medicine and a DO is a Doctor of Osteopathy).