Orthokeratology Consultation

The aim of Orthokeratology is to be free of both contact lenses and spectacles during waking hours making it a viable alternative to refractive surgery. At Zacks London eye clinic, Orthokeratology treatment has become so popular that it now constitutes a large part of our clinical time. We consistently achieve excellent results with myopic prescriptions up to -5.00 and sometimes it is possible to correct much higher prescriptions.

To make an appointment simply call us on 020 7713 7713 or send an email to: info@zackseyes.co.uk

At Zacks Eye Clinic in central London we have optometrists who specialise in fitting Orthokeratology (Ortho-K) contact lenses.

Orthokeratology, also known as overnight vision correction (OVC) involves using specially designed rigid gas-permeable contact lenses to alter the shape of the cornea in order to reduce or correct myopia (short-sight).

In the last few years, advances in technology have made it possible to accurately scan the cornea and manufacture orthokeratology contact lenses which achieve a controlled and precise reduction in spectacle prescription. New developments in lens materials enable this to be done safely with overnight wear which is why the procedure is sometimes known as overnight vision correction (OVC).

Orthokeratology Fitting
Every patient who wishes to undergo Orthokeratology treatment requires a specialist contact lens consultation in addition to the eye examination even if they are longstanding contact lens wearers. This is to ensure that the eyes are healthy and to take a series of special measurements and scans to confirm suitability and calculate the prescription.

Orthokeratology contact lenses are specially made and a collection appointment is required to check the fitting and instruct on usage. Patients are then asked to return the following morning for a check-up after the first nights wear, with further check-ups after one week and one month of treatment.

Most of the visual changes with Orthokeratology treatment occur rapidly in the first few days requiring frequent examinations and in some cases, progressive lens changes. Stabilisation follows at a slower pace over the next few weeks. The cornea is highly elastic, however and always eventually returns to its original shape. For this reason, retainer lenses are necessary to maintain the improvement in vision. They are usually worn overnight after the ideal corneal shape has been achieved.

Orthokeratology Aftercare
After the initial treatment is completed, regular follow up, orthokeratology aftercare appointments are very important to monitor vision, and eye health. Scans are taken at each appointment to see how the contact lenses have been fitting. Aftercare appointments are usually recommended every six months, however, they may be required more frequently for young children or those patients in need of more careful observation.

OrthoK lenses have completely improved the quality of our life. The competency and service provided by Zacks London Eye Clinic has been nothing short of amazing.

Anya and Stpehen

Advantages of Ortho-K, Overnight Vision Correction lenses:

Good vision without spectacles or contact lenses for most of the day
Children can be treated effectively and there is strong evidence that increasing myopia (short sight) is retarded (myopia control).
Overnight vision correction (OVC) is not a surgical procedure, so both eyes can be corrected at the same time and it does not cause the permanent hazy vision experienced by some patients following laser surgery
Ortho-k is modifiable and reversible meaning that changes in prescription can be easily dealt with, or treatment can be halted.
Most patients find over night vision correction comfortable after an initial settling period.
In the UK specific Ortho-k lenses are UKCA/CE marked for temporary reduction of myopia. In the USA overnight vision correction has approval for correcting up to -6.00 D of myopia.
Ortho-k works well for dry eye patients as they are free from contact lenses during the day.

Disadvantages of Ortho-K, Overnight Vision Correction lenses:

Ortho-K is not a permanent solution or a cure and is reversible.
Overnight vision correction requires long term maintenance, with strict hygiene and regular aftercare appointments (usually every 6 months following the initial treatment when the contact lenses need to be replaced).
The refractive error correctable by OrthoK is limited (usually to -6.00).
The corneal response to Ortho-k gentle moulding procedure, shows individual variance and is not always predictable.
During the initial stage of Orthok treatment, the effect is progressive so vision correction will be variable and daily disposable contact lenses may be required.
It is common to experience some glare around lights and mild ghosting or haloes which typically reduce by the end of the initial treatment phase.
Ortho-K, overnight vision correction is not suitable for patients with ocular surface disease, keratoconus or corneal dystrophies.
As with any contact lens wear there is a small risk of complications such as infection or allergy.

If you are interested in trying Ortho-K, overnight vision correction please contact us to make an appointment for a consultation at our central London practice.

Further Reading: Ortho-K for myopia Control.

Clinical Excellence in the Heart of Central London

Zacks London Eye Clinic is an independent practice in Fitzrovia, specialising in advanced diagnostic care for patients across Bloomsbury, Marylebone, and wider London. Tucked away in the quiet, secluded Warren Mews, our clinic offers a peaceful retreat from the surrounding city bustle, providing the ideal setting for focused, detailed eye examinations and consultations. Easily reachable via excellent transport links at Warren Street, Great Portland Street, and Euston Square, we invite you to experience a level of clinical precision that puts your eye health first.