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Overnight Contact Lenses for Vision Control/Correction

1.What Is Orthokeratology?

Orthokeratology (ortho-k), also called Overnight Vision Correction, Wavefront Corneal Molding, and Corneal Refractive Therapy (CRT), is the unique custom-designed, gas-permeable rigid contact lenses that you wear overnight. While you are asleep, the lenses gently reshape the cornea in order to correct your vision. After you remove the lenses the following day, you can see clearly.

The purpose of doctor prescribe ortho-k lenses:
1. To correct near-sightedness (myopia), farsightedness (hyperopia), and astigmatism. In some cases, ortho-k is also used to correct presbyopia.
2. To slow down the progression of childhood myopia

2.Who Is A Good Candidate For Ortho-k?



1. Need to slow down/stop the progression of childhood myopia

2. Want to be glasses-free during school, at sport or other daytime activities



1. Want to be glasses-free but not good candidates for refractive surgery

2. Who is a nearsighted, farsighted, and astigmatic patient


Sport Participator

1. Active during the day and doesn’t want to deal with contact lenses or glasses

2. Participate in contact sports (boxing, ice hockey, football, lacrosse) that can cause problems for contact lens wear


People Over 40

1. Who has presbyopia, but doesn’t want to wear reading glasses for their everyday reading

3. How Does It Work?

During your sleep, the Ortho-k lens creates pressure that gently reshapes your cornea from the original shape to a newly designed and preferred contour that gives you clear eyesight without glasses or contacts the following day


1. Before Bed

Put On Your Ortho-k


2. During Sleep

The lenses gently reshape the front surface of your eye (cornea) during your sleep


3. Wake Up

Take off the Ortho-k


4. Daytime

Enjoy a clear vision without eyeglasses or contact lens while you are awake

4. Have A Question?

5. Want To Know More?

MK Optical provide consultation for you. We specialize in orthokeratology lens fittings which can answer all your questions and concern and design customized Ortho-k that fits your/your kid's cornea shape