What is Ortho-k?

Ortho-k, also called orthokeratology, is a treatment using specially designed hard contact lenses, also called OK lenses, that correct vision while patients sleep. Ortho-k is sometimes called corneal reshaping therapy. It gently flattens the anterior part of the eye after overnight wearing. Patients wake up to a world of clear, sharp, natural vision after removing the lens in the morning.

What is the treatment outcome?

(1) Correct myopia and achieve clear natural vision without wearing any glasses during the day.

(2) Effectively curb excessive myopia progression for children, to prevent children from developing high myopia or pathological myopia.

Is Ortho-k safe?

Ortho-k has been used for vision correction for more than 50 years since it was first introduced in the 1960s. It is one of the most effective non-surgical treatments for myopia in the world to date. Its safety and efficacy have been validated by many clinical studies over the last 20 years. Under professional guidance, the risk of getting eye infection is very unlikely.

How does it work?

OK lens is designed with a flat centre and steep peripheral shape. It produces a mild pressure on the cornea and a hydrodynamic tear flow, which reshapes the cornea, thereby corrects the refractive error overnight.

How long does the clear vision last?

It normally takes 2 weeks of continuous night-time wearing to achieve full effectiveness. Patients can usually maintain clear vision during the day; some patients can even sustain a clear vision for a few days. Patients are required to wear the Ortho-K lenses (OK lenses) on a regular overnight schedule to maintain clear vision through the day.

Children who are treated with ortho-k for myopia progression control will have the option of laser eye surgery after their vision is stabilised as they reach adulthood.

Do you provide Ortho-k treatment for adults?

Yes we do. As Ortho-K treatment is carried out while you sleep, it is an execllent option for adults who would rather glasses or contact lenses free during the day; or for adults who need to participate in contact sports or young adults who prepare to have laser surgery in the future but are not old enough to have stabilized vision. It is also a great alternative to laser surgery for those who are not ready for the permanent procedure.

Adults who have myopia of less than -6.00 diopters and astigmatism of no more than -2.00 diopters will be good candidates for ortho-k.

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