What to Expect During Contact Lens Fittings
Our optometrists in Westminster offer contact lens fittings to ensure the proper fit and size.
A standard eye exam is routine for all patients to determine if they require corrective lenses or not. Additionally, a patient may also receive an eye health evaluation, which is more extensive for some patients based on their desires, current eye health problems, and medical history. If you are interested in contact lenses, our team at 20/20 EyeVenue will provide the testing and contact lens fitting you need to find the pair that's right for you.
Importance of the Sizing Process
The sizing portion of a contact lens exam is vital for matching you with the correct prescription. A poorly fit contact lens may not stay in your eye properly. Additionally, it could feel uncomfortable. Plus, the contact must stay in the proper position to optimize your vision.
This is especially the case if you have astigmatism. A contact lens for astigmatism has different focusing powers in different portions of the contact. If it doesn't stay in place, you may experience blurry vision or just not receive the optimal vision correction from the lenses.
If you choose Ortho-K, a special fitting for gas-permeable lenses that you sleep in, they require a specialized fitting process to ensure they reshape your eyes in a manner that corrects your vision.
Contact Lens Fitting Process
During a contact lens fitting, we will have you look into a machine that gathers information about the dimensions of your eyes. The process is painless and takes only a few moments to complete. The machine, known as an auto-refractor, takes measurements of your eyes. It does so by shining light into your eyes and evaluating how the light reflects at different angles.
It's possible you'll need to have another test as well to fit you for contact lenses, which uses a keratometer. A keratometer is a machine that assesses the shape of your cornea. It's an evaluation used particularly for people with astigmatism or corneal problems. It determines if your cornea is more round or flat.
Understanding Your Prescription
Not every prescription looks the same for contact lenses. For instance, those who have astigmatism and wear toric lenses, or ones specifically for astigmatism, will notice more values than a standard prescription.
If you don't have astigmatism, you'll notice your prescription has three numbers: base curve, diameter, and power/sphere. The base curve is a number written in millimeters that determines the curvature of your eye. The diameter is the width that is best for your eyes. The power/sphere is the strength of the contacts you require to optimize your vision.
If you have astigmatism, you'll have two additional numbers: the axis and cylinder. The cylinder is similar to the power/sphere because it's related to the severity of your astigmatism and the additional vision correction you require. The axis, on the other hand, is another number related to the curvature of your eye. It determines the angle of correction you need in order to see clearly with your contacts.
Those with presbyopia will have two additional values on their prescription besides the ones mentioned above. The ADD value describes your near vision, while the other part of your prescription lets you know which contact is for your dominant and non-dominant eyes.
The contact lenses fitting process is relatively simple for patients. In just a few extra minutes after your visual acuity test, an optometrist can match you with the correct sized lenses for you. This is imperative for both the comfort and power the contacts have to correct your vision.
Visit Us for a Contact Lens Exam from Our Optometrists in Westminster
To learn more about contact lens fittings at 20/20 EyeVenue, give us a call today at (720) 405-2020. We also offer lens tinting, eyeglass fittings, repairs and adjustments, and other services to improve the performance and look of your eyewear. Our team is dedicated to providing patients in Broomfield, Denver, Westminster, and surrounding areas the testing and treatment they need to maintain optimal vision and eye health.