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CANDY:

Controlling Astigmatism and Nearsightedness in Developing Youth
David Bartels, O.D., Peter E. Wilcox, O.D.


ABSTRACT:

Background

The progressive worsening of myopia and/or astigmatic refractive errors is a serious concern for both the child and their parents. The treatment procedure known as orthokeratology has been shown to slow the rate of progression in children. This study attempted to replicate these findings.

Methods

The “No-mold” retrospective refractive data from 20 children (40 eyes) who subsequently chose orthokeratology treatment were obtained from patient records. The duration of refractive data varied from as little as 2 to as much as 82 months. The “Molded” phase included 28 children (56 eyes). Baseline data included refraction, Simulated K (Sim K) and topographic maps. They were fit with Wave custom designed orthokeratology mold lenses. Treatment duration was 7 to 57 months. The “Unmolded” phase involved discontinuing orthokeratology treatment until flat Sim K returned to within 1D of pre treatment or 14 days.

Results

The mean change in spherical equivalent refractive error (SEQ) during the No-mold phase was - .37D per year. The mean change in SEQ during the Molded/Unmolded phase was -.03 D per year.

Conclusions

Orthokeratology treatment does slow the progression of myopia in children.

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