An optometrist is a doctor who deals strictly with eyes, does eye exams, fills perscriptions for eyeglasses and contact lenses, occasionally treats eye infections, and can determin if you have a condition requiring further medical attention. If so, he or she will refer to to an opthalmologists.
An opthalmologist is a medical doctor who specializes in conditions of the eyes and optic nerve. They treat people with disorders that effect vision, such as glaucoma, diabetes, and macular degeneration. They often perform surgery on the eyes. They do not usually prescribe glasses like optometrists do.
Opthamologists are Medical Doctors who specialize in eye disease and eye care. They can perform surgeries.
Optometrists are Doctors of Optometry, and are trained to detect vision problems and prescribe glasses or contacts. For serious eye problems, they must refer to the guy above.
an optimoligist is the person who actually makes your glasses, or fits the lenses to the frames, and the optometrist is the person checking your eyesight