Orthokeratology, also known as Corneal Refractive Therapy (CRT) is a contact lens therapy which temporarily eliminates myopia (shortsightedness). Specialist lenses are worn overnight during sleep and removed in the morning, enabling glasses and contact lens free vision during the day.

CRT lenses alter the shape of the front of the eye (the elastic cornea) by the generation of controlled hydro-static (liquid tears) pressure. The corneal optical power is altered by the desired amount, to eliminate the short sight present in the eye. The process is safe and fully reversible: if lenses are not worn the cornea gradually returns to its original shape.

Different systems of orthokeratology are available at the practice, all of which are FDA approved. Dr Levit is a specialist in orthokeratology and has been practicing this art and science of since 1995; he is an accredited member of the British Orthokeratology Society.

For more information on Orthokeratology, or to book an appointment please contact reception.



Corneal Refractive Therapy (CRT) VS Laser Vision Correction (LVC)

Corneal Refractive Therapy (CRT) VS Laser Vision Correction (LVC)

Although both methods aim to achieve correction of myopia (short sight) they are radically different. Laser Vision Correction (LVC) is a surgical procedure which creates permanent corneal tissue changes, with all the potential risks and complications, which may arise in a surgical procedure which is irreversible.

Corneal Refractive Therapy (CRT) is a therapeutic, non surgical, reversible tissue manipulation, also known as Ortho- Keratology, which aims to achieve all the benefits of a completely successful LVC without the potential complications. CRT always allows the option to return to normal glasses and contact lenses or even to have LVC if desired.

The permanency of LVC and the reversibility of Ortho-K could be viewed as an advantage and a disadvantage depending on the personal aim of the patient. I think it is appropriate for each individual to consider these options according to their personal perspective. 

Ortho K has a very good safety record; it is a FDA approved procedure. Nevertheless it has to be practiced professionally and used responsibly with strict attention to personal and contact lens wear hygiene. 

A. Levit Bsc (Hons) FCOptom (CL CVP)