Visual quality in the age of refractive cataract surgery -- Analysis of objective visual quality based on Double-pass technology -- Clinical significance of the main parameters of Double-pass Optical Quality Analysis System -- Acquisition mode and operation procedure of Double-pass Optical Quality Analysis System -- Clinical application of objective evaluation of tear film optical quality -- Objective classification of cataract -- Timing of cataract surgery -- Prediction of the visual quality after cataract surgery -- Doctor-patient Communication -- Comparison of cataract treatment methods -- Optimal treatment timing for posterior capsule opacification.

This book introduces the principle, main parameters, acquisition mode and operation procedure of Optical Quality Analysis System II (OQAS II) based on double-pass technology. OQAS II is increasingly used in the diagnosis and assessment of ocular diseases, especially for cataract. In this book, the clinical practice of OQAS II in the field of refractive cataract surgery is emphasized, including the preoperative/postoperative evaluation of visual quality, the timing of cataract surgery, the prediction of the visual quality after cataract surgery and doctor-patient communication. We hope the book provides a reference for the clinical application of the OQAS II in the field of cataract and helps to form the worldwide standard specification to a certain extent.