Contact lens exams, like all regular eye exams, allow your optometrist to take a thorough look at the health of your eyes and the quality of your vision. Doing this regularly — about once a year — also lets your optometrist keep a close eye (if you’ll pardon the pun) on any changes to your vision before they become serious.
However, if you’re a contact lens wearer, it’s important to make sure that your lenses fit both your eyes and your vision properly. In addition to a comprehensive eye exam, a contact lens exam will also involve a contact lens fitting. Here’s what to expect.
Routine, comprehensive eye exams
Whether you have 20-20 vision, eyeglasses or contact lenses, you need regular eye exams to help keep your eyes and vision at their best. Normally, this involves:
- Eye tests to determine your refractive error and prescription
- Cover tests that check how well your eyes work together
- Slit-lamp exams that give your optometrist a magnified view of the structures in your eyes in order to determine their health
- Eye pressure or “air puff” tests that check for glaucoma
- Pupil dilation that gives your optometrist a better view of the back of your eyes
Contact lens fitting
Contact lenses are medical devices, so you need a contact lens prescription in order to buy them, and your optometrist is required to make sure that your vision examination for your contact lens prescription involves finding the right fit for your lenses.
A contact lens fitting involves both a consultation and measurement.
Your optometrist will ask you about your lifestyle and preferences. Some contact lenses may be better for athletes with active lifestyles, for instance; others may be better for frequent travellers who might need to occasionally sleep in their contacts.
Your optometrist will also need to gather several measurements. The most common is the curvature of your cornea, your eye’s clear front surface. In some cases, your pupil and iris size will also be measured. If you tend to have dry eyes, your optometrist may also perform a tear film evaluation to make sure you’re prescribed contact lenses that keep your eyes sufficiently moist.
Remember, your optometrist is your ally in making sure your eyes get what they need to stay healthy and perform at their best. Make sure you seek professional advice whenever you’re encountering or making changes involving your eyes and vision.