Orthokeratology (Ortho-K)

What is Orthokeratology

Orthokeratology (also known as Ortho-K) is a non-surgical corneal reshaping of the eye using night-time custom contact lenses; this process allows individuals to enjoy an active lifestyle without the need to wear glasses or contact lenses in the day. There is no cutting and it is reversible. To many parents, they find that it is one of the most effective way for myopia control. For many people, it's an attractive alternative to Lasik.

Key Benefits

NO RISKs associated with Surgery

Wearing Ortho-K lenses is a non-surgical vision correction therapy

Vision Freedom

Ortho-K eliminates the need for glasses or contact lenses during the day.

Eliminates or Retards Myopia Progression

Several Research indicates that Ortho-K can help to slow down or stop myopia progression. (see research reference links)

Reversible Therapy

Good news! When you stop wearing your Ortho-K lenses regularly, your eye can revert back to its original status gradually.

Suitable for Many

  1. Anyone with low to high myopia can be accessed for suitability of wear
  2. Children who are active and with myopia
  3. Teenagers whose myopia continues to increase
  4. Adults whose occupations do not encourage or allow eyewear

Long Term Benefit for Growing Children

With myopia controlled, the risk of eye health problems related to myopia such as retinal detachment, floater etc. is significantly reduced.


Ortho-K  was developed by a few optometrists and has been practiced as early as the 1940s. This is comprable to orthodontia, or dental braces, which was not willingly embraced by dental surgeons until the late 1970s. Today, braces are very common among children and adults. The same is true for Orthokeratology ('braces' for the eye).

Research reference links

Clinical Experience: Read The Article Here

SMART study: Read the Article Here

LORIC study: Read the Article Here

Seven Year Study: Read the Article Here

Ortho-K Article: Read the Article Here

Frequently Asked Questions

When can I start my child on the Ortho-K program to control the myopia?

There is no age restriction. It is especially beneficial for young school age children who often experience increase in short-sightedness (myopia) every year. Worldwide, many children have undertaken the Ortho-K program because it has reduced or eliminated the progression of myopia. Many children are thrilled with the Ortho-K treatment.

Can anyone wear Ortho-K lenses?

Several recent advancements in technology and manufacturing techniques now make it possible to correct low to high myopia (short-sightedness), hyperopia (long-sightedness), presbyopia (the need for reading glasses), and astigmatism. Unfortunately, there is still a small population who are not suitable to wear Ortho-K lenses. Allow us to examine your eyes to have an idea of your suitabilty.

Does it hurt when the Ortho-K Lenses are placed on the eye?

It is not painful. Initially, you may have a slight awareness of the Ortho-K lens. You will not feel the lenses when you sleep and there is no sense of physical corneal change, just visual improvement when the lenses are removed.

Can I see while wearing the Ortho-K lenses?

Yes, you will have good vision when wearing the lenses.

Is Ortho-K safe? Are there any side effects?

Ortho-K is very safe, non-invasive and reversible. There are no known adverse side effects reported to the FDA (Food and Drug Administration, USA). An additional key safety benefit of Ortho-K is that if you stop wearing the lenses, your vision will return to previous levels.

Keep in mind that there is a risk involved for wearing any form of contact lens when individuals do not adhere to the scrupulous disinfection and care procedures (not limited to Ortho-K lenses only). Infection leading to vision loss is one of the most serious problem that may arise from improper lens care. Hence, it is very important to wear the lenses only as instructed and be present for all regular progress checks.

Is CRT the same as Orthokeratology (Ortho-K)?

Yes! There are numerous popular terms for Orthokeratology. You may have heard of the term Orthokeratology (Ortho-K), Corneal Refractive Therapy (CRT), Vision Shaping Treatment (VST), Gentle Shaping System, Corneal molding, Wave Front Corneal Moulding ,and Gentle Molding.

In addition, the device used to correct vision may be referred to as Retainer Lenses, Vision Retainer, Retainers, Ortho-K Lenses, Corneal Moulds, Moulds, Wave Lenses, and CRT Lenses.

Is the Corrected Vision permanent?

No. Orthokeratology only works when you continue to wear the Ortho-k lenses as recommended by the optometrist. If you stop wearing the lenses regularly while you sleep, your vision will bounce back to its orginal state gradually.

Why should I start my child on the Ortho-K program to control their myopia when they can have Lasik in the future?

Eye conditions such as Glaucoma, Retinal Detachment tend to be more prevalent in individuals with higher myopia. Controlling the myopia minimises their risk of eye disease.

How much does Ortho-K cost?

The price of Ortho-K lenses depends on the prescription and complexity. Ortho-K programs are available, ranging from $1800 to $2600.