What's the difference between optometry and ophthalmology and optician?

Much: Optometry - specialty eye professional very well trained to prescribe corrective lenses and in some states prescribe some meds. Opthalmology - physician who has received additional training in eye disease, eye surgery. They are very well trained in treating medically and surgically. Optician - technician trained to make glasses.

Eye MDs : Ophthalmologists are medical doctors and surgeons, trained to diagnose and treat diseases of the eye with medicine or surgery. Optometrists are trained to diagnose and treat some eye disease, but mainly treat refractive errors with contacts and eye glasses and refer other treatments to ophthalmologists. Opticians specialize in eyeglass and contact lens dispensing. All have their place.

Eye doctors: An ophthalmologist is a physician with an md or do degree. An optometrist receives a degree from an optometry school but is not a physician. An optician is trained to fit glasses.