Optometrist (OD): A licensed eye care provider who performs eye exams and other eye care services, and prescribes glasses, contacts, and other vision aids.
Ophthalmologist (MD): An eye doctor who performs eye exams, treats eye disease, conducts surgery, and prescribes glasses, contacts, and other vision aids.
Optician: An eye care provider who reads vision prescriptions and helps you choose the glasses, contact lenses, and other eye aids that are right for you.