The contact lens evaluation involves three parts. First, the doctor looks at the cornea (the front surface of the eye) with a microscope to ensure that there is no inflammation related to contact lens wear. Next, he selects a pair of trial contacts based on the patient’s wear schedule, eye health needs, and prior lens preference. Third, the patient inserts the lenses and the doctor looks at two things: the fit of the lens on the eye using the microscope and the patient’s vision with the lenses. Adjustments are made as necessary.