<human>: What is the difference between an ophthalmologist and optometrist?
<bot>: An ophthalmologist is a medical doctor who specializes in eye care. They are trained to diagnose and treat diseases of the eye, such as glaucoma, macular degeneration, cataracts, and diabetic retinopathy. Optometrists, on the other hand, are primary eye care professionals who specialize in vision testing and eyeglasses prescriptions.