Just like one shoe size doesn't fit all, one contact lens size doesn't fit all. If the curvature of a contact lens is too flat or too steep for your eye's shape, you could experience discomfort or even eye damage. Because of this, the contact lens exam includes elements besides those of the 10 Point Comprehensive Examination.  Additional portions of a contact lens fitting may include:

Measurement of your eye's surface and curvature: An instrument called a keratometer will be used to measure the curvature of your eye's clear front surface (cornea). These measurements help Dr. Ellerbrock determine the proper curve and size for your contact lenses.

Tear film evaluation: Contact lens fittings may also include a tear film evaluation. Your eye's moisture content may be evaluated by placing fluorescein dye in your eye through eye drops, and then evaluating how long it takes for the dye to be washed away by your eye's tears. If your eyes don't produce enough moisture and you have severe dry eye, contact lenses may not be right for you. Additionally, certain contact lenses such as those made of silicone hydrogel material may work better for eyes that are dry.

Evaluation of your eye's surface and contact lens fit: The health of your cornea will also be evaluated using a biomicroscope. This lighted instrument with magnification will provide detailed information about your eye's surface as a baseline for Dr. Ellerbrock to evaluate any future changes to your eyes related to contact lens wear. The biomicroscope can also be used to evaluate the fit of a diagnostic pair of lenses, because it allows the doctor to observe alignment of the lens as it rests on the surface of your eye and how much the lens moves after each blink to make sure that the fit is correct.

After finding a contact lens that fits properly, is comfortable for you, and provides good vision, Dr. Ellerbrock will write a contact lens prescription. This prescription will designate contact lens power and a shape matching the curvature of your eye (base curve).

It typically takes about two office visits to complete the contact lens fitting. After that, your eyes will need to be examined once annually so that Dr. Ellerbrock can monitor the health of your eyes. A few patients may need contact lens progress evaluations prior to the annual visit.