boy on a bed holding teddy bear

Correcting vision while you sleep


Orthokeratology (also known as Ortho-k) allows you to enjoy an active lifestyle without wearing glasses or contact lenses. For many people it’s an attractive alternative to laser eye surgery (such as RK, PRK, ALK, LASIK, and LASEK).

How it works

Specially-customized contact lenses are made specifically for your eyes which can be worn either at night or during the day, while you sleep. Upon awakening, your lenses are removed to enjoy excellent vision while awake.
young woman sleeping with a smile

Who can benefit from Ortho-k

People who find contact lenses uncomfortable because of dryness or irritation may benefit from orthokeratology. Those who engage in sports and have active lifestyles may also enjoy the freedom that Ortho-k brings. This procedure is particularly pertinent to high myopes (people with nearsightedness) and to children with progressive myopia and astigmatism.

Ortho-k Expertise

The eye's surface is carefully mapped to provide a custom fit for every orthokeratology patient.

Dr. Chow is the first Canadian optometrist to engage in the practice of orthokeratology with the accelerated and advanced method of performance. He is highly experienced, having performed several thousand procedures.

Dr. Chow and his team at CHOW Eye Institute are committed to provide the best care and service for all patients. For more information on orthokeratology procedures, please request an appointment or contact us. Additional information on orthokeratology can be found here: