An optometrist is a specially trained optician who is authorized (licensed) to perform eye examinations. This includes prescribing and dispensing corrective lenses and other eye-care products, and detecting eye diseases and abnormalities.

If an optometrist discovers some abnormality or eye disorder during an examination, he will instruct the patient to visit an ophthalmologist for further medical treatment.

An optometrist can provide a professional fitting and instructions necessary for contact lenses.