Orthokeratology is a non-surgical method of vision correction that involves wearing specially designed hard contact lenses overnight. These lenses gently reshape the cornea while you sleep, correcting refractive errors, such as, but not limited to myopia (short-sightedness).[i] The benefit? Clear unaided vision throughout the day without the need for refractive surgery, glasses, or daytime contacts.
The unique curved design of Ortho-K lenses generates pressure in the thin layer of tears under the contact lens. By applying gentle pressure to specific areas of the cornea, Ortho-K lenses alter its curvature of the eyeball, effectively changing the way light rays are refracted onto the retina.[ii] It’s this gentle tear pressure, rather than the lens itself, that is responsible for the subtle change in corneal shape and subsequently, clarity of sight.
Worn while you sleep, orthokeratology lenses are made from a highly oxygen permeable (breathable) material enabling treatment to proceed relatively safely during sleep without the problems caused by a lack of oxygen to the cornea.
The cornea is highly elastic and will return to its original shape if orthokeratology lenses are not worn on a regular basis. For this reason, Ortho-K lenses are generally worn several times per week, or nightly, to maintain the re-shaping effect once the desired cornea shape has been achieved.
Orthokeratology is most commonly used for people who are myopic. It is ideal for sportspeople, swimmers or those who work in dusty or dirty environments for whom wearing glasses or contact lenses can be difficult. Our optometrists will assess your eligibility based on your prescription, eye anatomy and general eye health.
[i] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6095568/
[ii] https://www.contactlensjournal.com/article/S1367-0484(21)00017-5/abstract
Somerville & Merrin
Designed by Little Pig Consulting
Somerville and Merrin
Designed by Little Pig Consulting