Ortho-K ( Orthokeratology ) : Being free from corrective lenses during daytime.

by Nurul hafizah mizan .

How many times have you woke up and fumbled looking for your glasses.

"I am sure i put it here last night."

"Wait i think i left it in the bathroom after i washed my face .................."

A bit annoying isn't it. A bit frustrating.

How about waking up having clear vision like we USED to have back in those days. What a relief not having to wear these heavy glasses anymore. 

What a relief not getting the glasses fog up during these COVID19 mask wearing pandemic. ( Truth is you're wearing the mask wrongly, but that is another story).





 1. So What is Ortho-K? 

Ortho-k, shortform for ORTHOKERATOLOGY is a corneal reshaping therapy. In this therapy, you will wear a rigid gas permeable contact lens during your sleeping time .

Ortho-K is prescribed for 2 purposes: 

  • 1. To correct refractive errors (primarily nearsightedness, but also astigmatism and hyperopia). In some cases, ortho-k also is used to correct presbyopia.
  •  To slow the progression of childhood myopia

2. How long will the Ortho-k effect last?

You should be able to see acceptably well without glasses or contact lenses for a day or two, sometimes longer. For best results, you should wear the ortho-k lenses every night.

3. Which vision problems can Ortho-k correct?

Orthokeratology is most frequently used to temporarily correct myopia (nearsightedness). Generally, ortho-k can correct upwards of -6.00 diopters (D) of myopia.

Ortho-k also can correct lesser degrees of astigmatism, hyperopia and presbyopia.

4. Who is a good candidate for Ortho-k?

Most people with mild to moderate myopia (with or without mild astigmatism) are good candidates for ortho-k.

Because the corneal reshaping effect is temporary, little risk is involved, and you can discontinue wearing the lenses at any time — provided you are willing to start wearing glasses or contacts again when your myopia returns!

Children and young adults who want to be glasses-free but are too young for LASIK or are not good candidates for refractive surgery for other reasons (dry eyes, for example) often are good candidates for ortho-k. People who participate in contact sports or work in dusty environments that can pose problems for contact lens wear also can be good candidates.

5. What to expect when you begin Ortho-k treatment?

  • Our optometrist will begin by measuring the curvatures of your corneas using an instrument called a corneal topographer — a painless procedure that takes about a minute and produces a topographical map of your eye’s surface. 

  •  We will then order custom ortho-k lenses for fitting at a later date.


6. How long does it take for the maximum Ortho-k to take effect?

Some people can have excellent vision after a day or two of overnight ortho-k. But for higher prescriptions it can take two weeks or longer for maximum correction. 


For more questions or doubts, please feel free to talk to our optometrist by clicking the whatsapp button. 


We are excited to be with you in this journey!