A contact lens examination refers to the tests that assess your suitability for contact lenses and your eye measurement for the best lens fit. You can expect such evaluations anytime you visit your eye doctor in east credit to get a contact lens. This article will discuss what you can expect whenever you see an optometrist near you for contact lenses.
Your contact lenses have to be custom-made. The design is usually in such a way that they fit perfectly over your cornea (the outer part of your eye). The exact shape of the cornea depends on the curvature and size of the eye. These parameters vary from person to person, hence examining the best fit.
Moreover, the wrong contact lenses can lead to corneal damage through abrasion or infection.
For contact lens examination in Mississauga, ON, your optometrist needs to ensure that you are a suitable candidate for the lenses. That is where the tear film examination comes in—the exam tests for the eye’s lubrication. Your eye doctor in east credit will tape a unique paper under your lower eyelid and ask you to close your eye for some minutes. After you open your eye, the paper must have collected some tears, and the optometrist will measure this along the paper’s length.
The other method is to apply an eye drop containing a substance known as fluorescein dye. Then your doctor will measure how long it takes for the tears to evaporate.
Using contact lenses on dry eyes can lead to excessive irritation, and this is why a test for lubrication is necessary. Your optometrist may prescribe a special kind of contact lens for dry eyes if necessary. However, people who have very dry eyes are advised not to use a contact lens at all.
Two types of instruments- a keratometer and the corneal topographer- measure the corneal size and curvature. The latter gives a more accurate measurement. If you have an irregular corneal shape, a unique corneal lens known as the toric lens can work for you.
Your eye doctor also needs to measure the size of your iris or pupils. There are several ways to do this, but an automated instrument does it best.
After taking the measurements, your optometrist will try a series of trial lenses to determine the best fit. You will wear each of these for several minutes until they arrive at the most suitable one. The right fit should let you see better with very little or no discomfort.
Next, your eye doctor will order your contact lenses from your manufacturer. However, you can also get a contact lens prescription containing the lens’s brand name, the power, and the corneal measurements. With this, you can order your contact lenses yourself.
At Complete Eyecare, our optometrist will provide you with clear-cut instructions on inserting and removing your contact lenses. Always wash your hands thoroughly with a mild soap, rinse and dry them before handling contact lenses. They will come with a recommended solution for lubricating them. That is the only liquid you can use for lubrication. Store them as recommended by the manufacturer or your optometrist.
You will also get trial lenses to wear for some time, usually a week, after which you will return for further evaluation. Do not miss follow-up visits. Your eye doctor will assess the lens fit and check if there’s any corneal damage. They may change your lenses if they notice anything unusual.
Contact lenses can lead to dry eyes because they absorb tears to keep them soft. You may need to use eye drops to lubricate your eyes. There’s always a risk of corneal abrasion and infection, especially when you wear them for too long. Never sleep with your contact lens!
Do not hesitate to call or book an appointment with our optometrist in Mississauga, ON if you notice anything unusual.