publication 2011 Peripheral refraction and axial length at corresponding retinal locations Publisher Name ARVO 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