Orthokeratology, also known as Ortho-K, involves the use of custom fitted gas-permeable contact lenses to reshape the cornea in order to improve vision. Ortho-K is most commonly done to correct nearsightedness (myopia), and a small amount of astigmatism.
How Does Ortho-K Work?
Ortho-k treatment begins with your eye care specialist mapping out and measuring the surface of your cornea with a corneal topographer. Your eye care specialist can then design a lens that’s specifically fitted to the outer surface of your eye (i.e. the cornea).
These specifically fitted and custom-designed lenses are worn overnight. Ortho-k lenses work by flattening the center of the cornea, changing how light is bent as it enters the eye. Being rigid and gas permeable, these lenses are effective at reshaping the cornea, while letting oxygen in to maintain eye health.
While undergoing Orthokeratology, you can expect to see better, without the need for day-time glasses or contact lenses, for a day or two. For best results, Ortho-K lenses should be worn every night, to achieve sustained vision improvement.
Learn more about Orthokeratology by watching this video:
Corneal Refractive Therapy
Paragon CRT lenses are worn overnight and work to gently correct the curvature of the cornea while you sleep. Upon waking the lenses are removed and distant objects come into focus with the reshaped cornea. Patients can see clearly without the use of glasses or contact lenses during daytime hours.
I am ready, what's the next step?
Getting a comprehensive eye exam is the first step to having your vision corrected. During your eye exam, your optometrist will determine whether Ortho-K may be a suitable option for you and may recommend further testing or treatment.
The FDA has declared Ortho-K lenses are safe for use by people of many ages, including young children and adults – as long as the specialized contact lenses are made from certain highly gas-permeable materials. The risks of Ortho-K are very similar to the risks of wearing other types of contact lens correction.