S t a n   I s a a c s            |           F.J.  I s a a c s  Pte Ltd         
HOME OUR PRACTICE OUR SERVICES FACILITIES & EQUIPMENT ORTHO-K EYE INFO CONTACT US
ORTHOKERATOLOGY
WHAT IS ORTHOKERATOLOGY?
THE PROCEDURE
WHY HAVE ORTHO-K DONE?
IS EVERYONE SUITABLE FOR ORTHO-K?
WHAT DOES THE PROCEDURE INVOLVE?
DOES ORTHO-K HAVE ANY ADVANTAGE OVER LASER SURGERY(LASIK)? YES
WHAT ARE THE ADVANTAGES OF ORTHO-K?
WHAT ARE THE DISADVANTAGES OF ORTHO-K?
COSTS INVOLVED

WHAT IS ORTHOKERATOLOGY?

Orthokeratology is the application of individually designed extended-wear rigid gas-permeable (RGP) contact lenses to alter the shape of the cornea in order to reduce myopia (short-sightedness), hyperopia (long-sightedness) and astigmatism. Orthokeratology is also sometimes called Ortho-K, CRT (Corneal Refractive Therapy), Corneal Moulding, CCC (Corneal Corrective Contacts), VST (Vision Shaping Treatment), GVSS (Gentle Vision Shaping System), EZM (Eccentricity Zero Moulding) or AOK (Accelerated Orthokeratology).

This procedure has been available for nearly 40 years, however, it is only in the last 10 years that it has become a very feasible option for vision correction. Today, with space-age polymers, computerized corneal scanning, and highly sophisticated, truly accurate computerized lathes, the procedure accomplishes vision correction in a matter of days. In addition, new developments in lens materials have made rigid gas permeable contact lenses more permeable to oxygen enabling safe overnight wear. This allows patients to wear lenses overnight while sleeping and to have good vision throughout the day without using lenses or spectacles.

This procedure is effective in both children and adults, freeing them from spectacles and lenses so that they may enjoy a more physically active lifestyle. Current research from the Hong Kong Polytechnic University (LORIC Study) and the Ohio State University College of Optometry (CRAYON Study) shows that there is an added advantage in children as it slows down axial length growth of the eyeball, thereby slowing down myopic progression.

The Ortho-K technique is a viable and reversible alternative to refractive surgery. The cornea, however, is highly elastic and always returns to its original shape eventually. For this reason, the lenses are worn either nightly, or on alternate nights or for 3 to 5 hours each day once the ideal corneal shape has been achieved.



 
© 2006 ISAACS OPTOMETRISTS ALL RIGHTS RESERVED