Orthokeratology (ortho-k) fits specially designed gas permeable contact lenses that you wear overnight. These lenses gently reshape the front surface of your eye (cornea) while you are asleep, so you can see the following day after you remove the lenses. Ortho-Ks is a revolutionary FDA approved non-surgical procedure that eliminates the need for glasses or daytime contact lenses. It is a great alternative to Lasik for those not ready for surgery.
Ortho-K is not as new as you think. Ortho-K is often discussed as a recent or even brand-new innovation in optometry. The technique has its roots in scientific discoveries from the 1940s.
These lenses are prescribed for two purposes:
Ortho-k lenses are also called “corneal reshaping contact lenses” or “overnight contact lenses to correct or control myopia.”
When a person can not see clearly, their eye is too long, too short, or the surface is misshaped. Images fail to reach or focus on the retina, which produces blurred or distorted vision.
The surface of your eyes is mapped using a high tech instrument called a topographer, which allows your doctor to create a custom lens specifically designed for your eye and its unique visual problem. These contact lenses are made of highly oxygen permeable material, which allows your eye to breathe overnight and maintain excellent health.
This corneal reshaping lens has several specialised curves that reshape your cornea (front surface of your eye). The tear film beneath this therapeutic lens continuously flows across the corneal surface, re-sculpting the shape. This improved shape focus images directly on the retina. The result is crisp, clear vision upon waking and removing your lenses.
Ortho-K lenses are custom-made to the specifications prescribed by your eye doctor when they perform all the tests and fitting to provide the best possible vision, eye health and comfort.
For these reasons, professional fees associated with fitting ortho-k lenses and lens replacement costs are higher for ortho-K lenses than other contact lenses and varies with different brands.