Iris Or Pupil Size Test
Your eye doctor must measure the size of your iris or pupil. That way, you get the right size contact lenses for your vision needs. This is important for patients who want to wear hard gas-permeable lenses. Your eye doctor will hold a card or ruler close to your eye. This card or ruler contains various pupil sizes. It can estimate your pupil size well.
A more accurate way to do this is to use an automated instrument. This instrument can provide an exact measurement of your pupil. It can also give you the vertical and horizontal diameters of your pupils. Your eye doctor can use the same methods to get the exact measurement of your iris.
Cornea Curvature And Size Test
This test allows your eye doctor to determine the base curve and the right size of your contacts. Your dentist will use a keratometer to perform this test. Another instrument is a corneal topographer. This is more accurate than the keratometer, which only measures a small portion of your cornea.
A corneal topography test can provide details about the cornea’s surface. You will sit in front of a bowl with rings of light. Then, you will place your head to rest on a curved bar. The test will generate the resulting map of your cornea and display it on the computer screen.
Tear Film Test
Your eye doctor will use this test to see if you can wear contact lenses without any problem. Dry eye syndrome can lead to itchy and irritated eyes. This condition results from a low-quality tear film. Dry eye syndrome can make contact lens wearing difficult. If you are positive for dry eye syndrome, your eye doctor may prescribe contact lenses that can deal with this eye condition.
Your eye doctor will place a thin strip of paper below your lower eyelid. You will close your eyes for about five minutes as tears collect on the strip of paper. Your eye doctor will measure and evaluate the tears on the strip of paper. Another test involves placing fluorescein eye drops into your tear film. This test measures the evaporation time of your tears.
Trial And Prescription
Your eye doctor will let you try on a pair of contact lenses. This will confirm the comfort and fit before ordering our contacts. You should wear the contact lenses for 15 to 20 minutes before your eye doctor tests the tearing, fit, and movement of the lenses in your eyes. If the contacts are a good fit, your eye doctor will finish the order. You will receive set instructions for wearing and caring for your contact lenses. Your eye doctor will tell you how to store your lenses and how long you must wear them.
Knowing what happens during a contact lens exam can help you prepare for your next appointment. At Sure Vision Centers of Florida, we see to it that our patients get high-quality eye care products and treatments. Please drop by our center in Orlando, Florida, for an in-person consultation. Call (407) 964-8665 to set a consultation or inquire about our contact lens exam or fitting packages.