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What is Ortho-K?

Orthokeratology may sound dramatic, but it is quite simple. "Ortho" means to correct. Orthodontics correct teeth.


Orthopedics correct the musculoskeletal system. Orthokeratology corrects the refractive error by reshaping the cornea.


Orthokeratology, or Ortho-K for short, is a non-surgical and reversible procedure in which custom-designed contact lens devices are used to gently reshape the cornea (front surface) of your eye. It is also known as Corneal Reshaping Technology (CRT) and lenses are worn while sleeping, giving you clear vision during the day without the aid of glasses or contact lenses.

Orthokeratology can correct refractive errors like nearsightedness (myopia), farsightedness (hyperopia), astigmatism and can improve near vision after age 42 (presbyopia).


Ortho-K is ideal for children and adults with the following prescriptions:


  •  -1.00 up to -8.00 dioptres of myopia
  •  +1.00 to +4.00 dioptres of hyperopia
  •  up to moderate (-4.00D) amounts of astigmatism


Orthokeratology technology continues to evolve, and in many cases, Ortho-K can also successfully correct corneas with high astigmatism, presbyopia and Post-LASIK (refractive surgery) cases with residual refraction errors or irregular treatment areas.

What is Ortho-K?

Orthokeratology may sound dramatic, but it is quite simple. "Ortho" means to correct. Orthodontics correct teeth.


Orthopedics correct the musculoskeletal system. Orthokeratology corrects the refractive error by reshaping the cornea.


Orthokeratology, or Ortho-K for short, is a non-surgical and reversible procedure in which custom-designed contact lens devices are used to gently reshape the cornea (front surface) of your eye. It is also known as Corneal Reshaping Technology (CRT) and lenses are worn while sleeping, giving you clear vision during the day without the aid of glasses or contact lenses.

Orthokeratology can correct refractive errors like nearsightedness (myopia), farsightedness (hyperopia), astigmatism and can improve near vision after age 42 (presbyopia).


Ortho-K is ideal for children and adults with the following prescriptions:


  •  -1.00 up to -8.00 dioptres of myopia
  •  +1.00 to +4.00 dioptres of hyperopia
  •  up to moderate (-4.00D) amounts of astigmatism


Orthokeratology technology continues to evolve, and in many cases, Ortho-K can also successfully correct corneas with high astigmatism, presbyopia and Post-LASIK (refractive surgery) cases with residual refraction errors or irregular treatment areas.

Highly recommended. Mpumi is so friendly and provided such excellent customer service.Dr V Gopaul makes you feel very comfortable and helps you understand everything clearly. The eye test was very comprehensive, I learn't so much from one visit. Thank you to both for such a great experience. 😃

Maneesha Lalmund

How does Orthokeratology work?

Lenses that work when you aren't wearing them

Your custom-designed EyeSpace Forge Ortho-K contact lens reshapes the front surface of the eye while you sleep. It uses the forces of the eyelid and tear fluid beneath the lens to reshape the top layers of the cornea.


For the treatment of myopia, the lens produces a flatter central cornea, correcting nearsightedness by decreasing the power of the eye. For hyperopia and presbyopia, the design of the lens steepens the central cornea, correcting long-sightedness by increasing the power of the eye.

Immediate Improvement

Improvements in vision can usually be seen the next day, with the procedure stabilizing after a week. With high myopia over -6.00D, astigmatism and hyperopia the process can take two to four weeks to achieve full correction.


Ortho-K does not permanently change the shape of the eye. Your eyes’ shape will revert back to their original state within one to four weeks if you stop wearing the lenses.

Comfort and Safety

Forge Ortho-K lenses are surprisingly comfortable to wear. Most people comment that they forget they have lenses in after the first week of wear.


Similar to disposable soft contact lenses, the main adverse event associated with Ortho-K corneal reshaping therapy is an infection of the cornea, microbial keratitis.


With proper care and maintenance, the risk of inflammation and bacterial infections due to poor hygiene can be minimized.

How does Orthokeratology work?

Lenses that work when you aren't wearing them

Your custom-designed EyeSpace Forge Ortho-K contact lens reshapes the front surface of the eye while you sleep. It uses the forces of the eyelid and tear fluid beneath the lens to reshape the top layers of the cornea.


For the treatment of myopia, the lens produces a flatter central cornea, correcting nearsightedness by decreasing the power of the eye. For hyperopia and presbyopia, the design of the lens steepens the central cornea, correcting long-sightedness by increasing the power of the eye.

Immediate Improvement

Improvements in vision can usually be seen the next day, with the procedure stabilizing after a week. With high myopia over -6.00D, astigmatism and hyperopia the process can take two to four weeks to achieve full correction.


Ortho-K does not permanently change the shape of the eye. Your eyes’ shape will revert back to their original state within one to four weeks if you stop wearing the lenses.

Comfort and Safety

Forge Ortho-K lenses are surprisingly comfortable to wear. Most people comment that they forget they have lenses in after the first week of wear.


Similar to disposable soft contact lenses, the main adverse event associated with Ortho-K corneal reshaping therapy is an infection of the cornea, microbial keratitis.


With proper care and maintenance, the risk of inflammation and bacterial infections due to poor hygiene can be minimized.

Friendly service, Stylish frames. I was happy to book my appointment so quick and easy. The Receptionist was efficient and Dr. Gopal was so patient with me and explained every process.

Shalin Singh

Who can benefit from Ortho-K?

People who play sports

You can enjoy the freedom of playing sports without worrying about your glasses getting damaged or your contact lenses falling out.


Ortho-K lenses are only worn at night while you sleep, leaving you with perfect vision during the day on the sports field, court or in the swimming pool.

People working in dusty or dirty environments

Dusty or dirty environments can play havoc with contact lenses and glasses.


If you’re a tradesman who needs to squeeze into tight spaces or work in dusty work conditions, Forge Ortho-K lenses will allow you to see clearly and get on with the job.

People with dry eyes or allergies

Forge Ortho-K lenses are great if you suffer from allergies or dry eyes and work long hours on the computer or in air-conditioned environments.

Children with progressive Myopia

Forge Ortho-K lenses are an excellent option for children with progressive myopia (short-sightedness). Orthokeratology is scientifically proven to dramatically slow or potentially halt myopia progression and can positively impact the long-term health of your child’s eye.


Wearing Forge Ortho-K lenses only at night gives kids the freedom to run around, play sports and wear fashionable sunglasses during the day without worrying about their glasses or contact lenses in the eye.


In short, Ortho-K works best for people who don’t want to or are unable to wear glasses or contact lenses during the day but don’t mind wearing lenses while they sleep. People with healthy corneas who are unsuitable for laser surgery (LASIK) can still qualify for Ortho-K.


Children and teenagers especially benefit from the freedom to play sports and wear fashionable sunglasses. Parents love the fact that there is no risk of kids losing their contact lenses or spectacles. Ortho-K is an excellent option for those with youth-onset myopia due to the additional benefits of being able to slow and even halt the progression of myopia.


Contact us today to find out if you would be a suitable candidate for Ortho-K treatment.

Absolutely amazing - from the receptionist to the optometrist I had the most amazing experience. The glasses are probably the best I've had for a long time and the quality of the lense is amazing - not like the last 2 pairs I got from a large chain of optometrists which scratched terribly within the first couple of months. Thank you ☺️

Lynne K
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