Refractive error, visual acuity, and corneal-curvature changes in high and low myopes with orthokeratology treatment: A Malaysian study.

Background/purpose: The effect of orthokeratology (OK) on low myopia is well known, but there are a few reports on its effect on high myopia. In this study, the parametric changes in high and low myopia as results of wearing OK lenses for a period of 6 months have been analyzed.

Methods: Records of schoolchildren (age 7-17 years) undergoing OK treatment from an optometry clinic were retrospectively reviewed.