[1]Department of Ophthalmology Tangdu Hospital the FourthMilitary Medical University Xi’an710038 Shaanxi Province China;
[2]Xi’an No.4Hospital Shaanxi Eye Hospital AffiliatedGuangren Hospital School of Medicine Xi’an JiaotongUniversity Xi’an710004 Shaanxi Province China;
cataract surgery; refractive error; the first eye; the second eye;