Ortho K and Us

About Us

Manchester & The North West specialists in life changing Ortho K over-night corrective lenses

The Ortho K Clinic is one of the UK’s leading specialists using the very latest technology to gently modify your prescription while you sleep, allowing you comfortable, clear vision in the morning. For further information download ‘Life Without Lenses – A Complete Guide’ at the top of this page.

Colin TonnerContact Colin and his team with any questions or queries about Ortho K

  • 0161 300 6989
  • info@theorthokclinic.co.uk


The Ortho K Clinic was founded by Colin Tonner to provide you answers to that vital question: ¬†‘Ortho K. What’s that?’ and bring information on the benefits of not needing to wear lenses during the day to a wider audience. The ability of Ortho K to prevent the progression of myopia developing is now well established. If there is parental myopia and short sight is developing in your children, you now have the means to stop it or slow it. It is possible where Ortho K is not sufficient to halt myopic progression that adjunctive eye drops can be used as a combinational treatment.

Myopia results in a bigger, more stretched eyeball which has major implications for eye disease in later life. The more you can restrict myopia developing, the better the chance of avoiding some of these complications.

Colin has been specialising in Ortho K for the last ten years. He brings you a wealth of experience with specialist accreditation with the General Optical Council plus an accredited provider of Nocturnal, DreamLens and Paragon Overnight Vision Lenses.

He was also awarded Contact Lens Practitioner of the Year by the Association of Optometrists in November, 2015.

Colin is ably assisted by Adnan Undre, who was one of his early patients and still an ortho k wearing optometrist. His experience of wearing them over the last ten years, adds to his experience of fitting them.

Latest Press Releases


Key Team at The Ortho K Clinic

Colin Tonner : Clinic Director

Colin Tonner

Clinic Director

Colin has been fitting contact lenses for over 35 years - almost before the advent of soft lenses. In 1998, he returned to Manchester University to update his qualifications.

He is on the speciality register of The General Optical Council.

Member of the British Contact Lens Association.

Member of the College of Optometrists.

Member of  European Orthokeratology Society.

Association of Optometrists Contact Lens Practitioner of the Year 2015

Adnan Undre : Optometrist

Adnan Undre


Adnan was Colin's first Ortho K fitting when he was an optometry student. Having worn these lenses for about ten years, he has a greater understanding of the benefits of Ortho K for prospective wearers.

Registered with the General Optical Council

Member of the College of Optometrists

Member of the British Contact Lens Association

The Latest Ortho K News

Get to know more about Ortho K and read Colin's latest articles and posts. See all news & articles

AOP Contact Lens Awards 2015

The Ortho K Clinic’s optometrist, Colin Tonner, has been announced as winner of a prestigious national award in recognition of his services to optics.

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Short-sight increases in the young

The eye research charity Fight for Sight have highlighted the results of a study of over 60,000 people of European ancestry. This includes figures

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Contact Lens Specialist Symposium 2013

The Contact Lens Specialist Symposium 2013 held in London on 28-29th September 2013 brought together eye care practitioners from UK, Holland, Denmark, Sweden, Norway,

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Controlling Short Sight

The latest study to look at progress of short sight in children has clearly shown there is a significant benefit in wearing Ortho K

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