publication 2010 Overnight orthokeratology for myopia control: short-term effect on axial length and refractive error more of publication The effect of overnight orthokeratology on the human cornea by Ahmed A Alharbi, Helen A Swarbrick 2004 Orthokeratology research and clinical applications by Ahmed A Alharbi, Helen A Swarbrick 2005 Corneal thickness changes in overnight hyperopic orthokeratology by Pauline Kang, Helen A Swarbrick, Ahmed A Alharbi 2009