In 2004, the Children’s Overnight Orthokeratology Investigation (COOKI) pilot study published the first report on orthokeratology lenses for myopia control. Subsequently in 2005, the Longitudinal Orthokeratology Research in Children (LORIC) study was also released. Both studies showed that orthokeratology lenses were effective at controlling childhood myopia.
Results from recent clinical trials that showed orthokeratology lenses slow the progression of myopia:
Stabilizing Myopia by Accelerated Reshaping Technique (SMART)
A five year study initiated in 2009, evaluated the effect of orthokeratology lenses on myopia progression in 138 children. At the one year follow up, the children who were fitted with orthokeratology lenses exhibited a mean progression of 0 degree, compared to the control group that had an average increase of 50 degrees for myopia.
Corneal Reshaping and Yearly Observation of Myopia (CRAYON)
A two year study that confirmed children fitted with orthokeratology lenses experienced significantly less annual changes in axial length and vitreous chamber depth than patients fitted with soft contact lenses.
EAGLE MYOPIA CONTROL PROGRAM USING MYOPIA CORRECTIVE CONTACT LENS (EMCP LENS)
Based on these clinical studies, Eagle Eye Centre has designed the Eagle Myopia Control Program Using Myopia Corrective Contact Lens (EMCP LENS) for children 7 to 12 years of age.
This program consists of 12 visits in total; 9 visits to see the optometrist and 3 visits to see the doctor to monitor eye health. The child wears the myopia corrective contact lenses overnight, for at least 8 hours, in order to achieve the optimal effect of corneal moulding. The lens is to be removed upon waking in the morning and the effect of corneal moulding will temporarily allow the child to see without the use of optical appliances during the day. The exact time period over which the myopia remains corrected varies with each child and this effect can only be maintained by wearing the myopia corrective contact lenses every night.
The common side effects that occur in contact lens wear are decreased oxygen to the cornea, corneal staining and corneal abrasion. These are usually temporary if the lenses are removed promptly and professional care is exercised. They can also be prevented with proper lens maintenance and care. In rare instances, permanent corneal scarring and decrease in vision may occur. Therefore, it is mandatory to return for reviews that will be scheduled regularly in the program with our optometrist and ophthalmologist.
- Walline JJ, Rah MJ, Jones LA. The Children’s Overnight Orthokeratology Investigation (COOKI) pilot study. Optom Vis Sci. 2004 Jun;81(6):407-13.
- Cho P, Cheung SW, Edwards M. The longitudinal orthokeratology research in children (LORIC) in Hong Kong: a pilot study on refractive changes and myopic control. Curr Eye Res. 2005 Jan;30(1):71-80.
- Global OK-Vision. Orthokeratology Procedure. Available at: www.govlenses.com/orthokeratology/procedure.html (accessed June 26, 2012).
- Walline JJ, Jones LA, Sinnott LT. Corneal reshaping and myopia progression. Br J Ophthalmol. 2009 Sep;93(9):1181-5.