What to Expect During a Contact Lens Exam
A contact lens exam includes additional measurements and tests to determine which contact lenses suit your eyes. Because contacts rest directly on the eye's surface, their fit, material, and prescription all affect comfort and eye health.
How Your Eye Doctor Measures Your Eyes for Contact Lenses
Your eye doctor will measure the curvature of your cornea, the clear front surface of your eye, to help select an appropriate lens. They may also evaluate your tear film to check for dryness that could affect contact lens comfort.
The doctor will assess how the lenses sit and move on your eyes. A well-fitting lens should provide clear vision, allow appropriate movement, and support the health of your eye's surface.
Contact Lenses Require a Different Prescription Than Glasses
You can't use your glasses prescription to order contact lenses because the two prescriptions contain different information.
Glasses sit a short distance in front of your eyes, while contact lenses rest directly on the tear film covering the cornea. This difference can affect the required prescription power, especially for stronger prescriptions.
A contact lens prescription also specifies details such as the lens brand or material, base curve, and diameter to help ensure the lenses fit properly.
What Happens During a Contact Lens Fitting and Trial
Once your eye doctor selects suitable lenses, you'll typically try a trial pair to check fit, vision, and comfort.
First-time contact lens wearers will also receive instructions on how to insert, remove, and care for their lenses. Your eye doctor will explain the recommended wearing and replacement schedule, along with important hygiene practices.
A follow-up visit may be necessary to confirm that your lenses fit properly and your eyes are responding well. The timing depends on your lens type, eye health, and individual needs.