Ortho-K and Overnight Vision Correction

Ortho-K and Overnight Vision Correction 2018-06-18T00:37:19+01:00

Ortho-K and Overnight Vision Correction

An alternative to laser surgery, Ortho-K – short for orthokeratology and also known as overnight vision correction (OVC) – is a service that we offer to patients who prefer not to wear spectacles or contact lenses during the day.

Ortho-K treatment requires you to wear specially designed contact lenses overnight and works by altering the surface of the eye to correct your prescription. The lenses are then removed in the morning, leaving you with clear vision that is temporarily effective but fully reversible.

Overnight vision correction gives your eyes the freedom to breathe.

Made from a material that allows high levels of oxygen permeation, Ortho-K lenses are specifically designed for you to sleep in without having a drying effect. Leaving a residual window over your cornea that corrects short-sightedness, the effects last throughout the day and remove the need to wear glasses or daytime lenses.

OVC provides a less invasive alternative to laser eye surgery, whilst freedom from spectacles and contact lenses means that sports can be enjoyed more conveniently and eyes are less irritated during the day.

Having been used for vision correction for more than ten years, Ortho-K has also proven to be a highly effective treatment for short-sightedness in children. Recent research has even shown that it could help slow the progression of myopia in younger patients.

Discover Ortho-K for children



The Optomap is the only test that captures more than 80% of your retina in one panoramic image. The unique optomap ultra-wide view helps detect early signs of retinal disease more effectively and efficiently than with traditional eye examination alone. The test is fast and pain-free and nothing touches your eye.



Monday – Friday 9:00 – 5:30
Saturday 9:00 – 4:00
Sunday Closed


Harrow Practice

Northwood Practice


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‘My family have been attending Parker & Hammond for several years.
We all have differing needs but all receive an excellent, caring,
thorough service that is never rushed.’

'Each and every member of staff treats me with the utmost courtesy and patience.
The kind of service offered at Parker & Hammond is truly professional yet personal
and friendly – I would highly recommend them.'

‘Thanks to the expertise of the team at Parker & Hammond,
I finally feel that after 30 years of struggling with various lenses,
my keratoconus is finally, at long last, a problem solved.’

‘The quality of care and advice I have received has been first class and I would
have no hesitation in recommending the practice.’

‘From the moment I stepped into the shop I was given first class service,
made to feel valued and had the most thorough eye test I’ve had to date.
Dipesh provided valuable explanations and information as he carried out the test,
and I purchased a pair of Lindberg glasses, with which I am very pleased.’

‘Finding a good opticians who you can trust and who understands your eye needs isn’t easy,
and I would recommend them to anyone – particularly those with keratoconus.’

‘I have been wearing glasses for over 15 years and have been to many opticians in the past,
but Parker & Hammond have by far been the best. Their staff are excellent and they give
me honest, sound advice which I have always trusted. The eye test is very thorough
and the optometrists do their best to make you feel relaxed and comfortable.’

‘I would highly recommend Parker & Hammond – professional, courteous and friendly,
from everyone who I come into contact with during my visits.’

‘The opticians here are really friendly and patient, they take the time to answer my questions,
give useful advice and – unlike other places I’ve been to in the past – the costs are fully explained.’

‘The service I receive whenever I come into this shop is outstanding.
I would and do recommend to all who will listen!’

‘Although the road to keratoconus solutions is sometimes trying, you know you have
a specialist here who will truly work tirelessly to find one.’

‘My family have been customers here for many years, brought back every time by impeccable
customer service, attention and professionalism. All staff are welcoming and have a full
understanding of the products, with information given throughout the spectacle purchase.’

‘For the past ten years Parker & Hammond have been my opticians of choice, from the warmth and efficiency met with at reception
to the unstinting care and detail at the eye test stage. In assistance with frame choice and dedication to guaranteeing comfort with your spectacles,
Parker & Hammond have proved themselves to be the best I have encountered. Add that to superb aftercare and you have the recipe for satisfaction
and perfect confidence that your eyecare could not have been in better hands. I have recommended them in the past and will continue to do so – wholeheartedly.’


To book an appointment with one of our eye care specialists at our Harrow or Northwood practices,
simply get in touch or use our online booking service.

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