Orthokeratology: What is it and How Does it Work?


Have you ever heard of Orthokeratology? If you haven’t, you are not alone. Orthokeratology, also known as Ortho-K, is a non-surgical procedure that uses special contact lenses to reshape the cornea while you sleep so you can see clearly during the day without the need for glasses or contacts.

But wait, how can a contact lens help you see without wearing one during the day? Let’s explore this magical technique!

What is Orthokeratology?

Orthokeratology is a non-surgical and non-invasive procedure that temporarily reshapes the cornea by wearing specially designed contact lenses while you sleep. These lenses, also known as “corneal reshaping lenses” or “night lenses,” are made of a highly gas-permeable material, which allows oxygen to reach your eyes while you sleep.

During the night, the lenses gently reshape the cornea, temporarily correcting myopia, hyperopia, and astigmatism. The effects of Ortho-K can last up to 24 hours or longer, depending on the person.

How Does it Work?

The science behind Ortho-K is quite simple. The contact lenses work by gently pushing on the cornea, flattening the front surface while thickening the back. This change in the shape of the cornea changes the direction of light entering your eye, which corrects the refractive error and improves vision.

It’s important to understand that Orthokeratology is not a permanent solution and needs to be maintained with regular check-ups and lens replacements to achieve optimal results.

Who Can Benefit from Orthokeratology?

Ortho-K is a procedure that can benefit anyone who has a mild to moderate prescription and doesn’t want to wear glasses or contact lenses during the day. This is especially useful for those who play sports or have an active lifestyle, as well as children or teenagers, who may find glasses or contacts uncomfortable or impractical.

However, not everyone is a candidate for Ortho-K. Those with severe prescriptions, corneal diseases, or other health issues that affect the eyes may not be able to undergo this procedure.


Orthokeratology is a safe and effective alternative to traditional vision correction methods, providing clear, sharp vision without the need for glasses or contacts during the day. The technology has come a long way since the early days, and today, it is a great option for those who want to avoid surgery, but still want the benefit of clear vision.

If you are interested in learning more about Orthokeratology and whether it is right for you, talk to your eye care professional. They can help you understand the procedure in detail and determine if you are a good candidate for it.

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