An optometrist is a primary care provider who diagnoses, treats, and manages conditions related to your eyes and vision. An optometrist can prescribe glasses and contacts, as well as drugs and treatments for certain eye conditions.
An ophthalmologist is a physician who has received additional specialized training in surgery, as well as diagnosing and treating eye diseases. Patients are usually referred to an ophthalmologist by their optometrist.
An optician is a professional who fits and adjusts eyeglasses, contact lenses or subnormal vision devices based on a prescription provided by an optometrist or physician.