Are Ortho-k lenses effective enough in slowing and even reducing the rate of myopia progression in children?

By Adrienne Richards BSc(Hons) FBDO INTRODUCTION Orthokeratology has been practiced in society since the 1940s and has been widely discussed since the 1960s (Bansal, 2012). It claims to reduce and slow the rate of myopia effectively in children and adults (Santodmingo-Rubido et al, 2009). George Jessen created the first Polymethylmethacrylate (PMMA) contact lenses in the 1960s and found that by fitting a contact lens which was firstly flatter than the flattest keratometry reading (Kf), a temporary reduction in myopia was established after the lens was removed (Bansal, 2012).