EVEN MORE Evidence that Orthokeratology Slows Myopia Progression
I recently "argued" with yet another ophthalmologist about this (this time on Yahoo Answers). He says that ortho-k lenses are "dangerous" b/c they "press" on the cornea (they don't). He says They're "temporary" anyway b/c they don't "reshape the eye". SIGH. Man just b/c someone has a degree doesn't make them educated on every subject. Some people are woefully misinformed (or have an agenda). Here's the latest news on ortho-k and myopia control: CRIMPS STUDY Analysis of Orthokeratology on Childhood Myopic Refractive Stability This study determined whether overnight orthokeratology (OK) influences the progression rate of the manifest refractive prescription in myopic children, when compared with an age- and refraction-matched spectacle-wearing control group, over a period up to eight years. The right eyes of control (n=30) and OK (n=26) children were compared. Treatment groups were matched for baseline age and refractive error. At baseline, children were younger than 16 years and showed manifest spherical refractive error more than -0.50D. The minimum period of evaluation for each child was two years. Changes to manifest refractive prescription were compared between the groups in two yearly intervals up to eight years. On the whole, OK eyes showed a significantly more stable myopic refractive prescription than control eyes over all of the two-year treatment intervals. A subpopulation (n=18; 64%) of OK eyes demonstrated an apparent total arrest of manifest myopic refractive change. Symmetry in the vertical meridian of baseline corneal topography was associated with a greater degree of refractive stability in OK eyes. This retrospective study provides evidence that OK can reduce the rate of progression of childhood myopia over the long term. In addition, these findings offer some early insight into a potential indicator that may help predict the extent of refractive stability in individual eyes undergoing OK. SOURCE: Downie LE, Lowe R. Corneal reshaping influences myopic prescription stability (CRIMPS): an analysis of the effect of orthokeratology on childhood myopic refractive stability. Eye Contact Lens. 2013; Jun 13. [Epub ahead of print].