Objective        To investigate the ocular dominance change after binocular cataract phacoemulsification and intraocular lens implantation surgery and its impact on visual quality.       Methods       Totally 46 patients (mean age 65.8±1.3 years) receiving binocular cataract phacoemulsification and intraocular lens implantation surgery in our department from February to May 2013 were prospectively enrolled in this study. According to the degree of refraction

t

hey were divided into 2 groups

group A with the discrepancy of 2 eyes less than 2 diopter (n=27) and group B with the discrepancy greater than 2 diopter (n=19). All patients were received ocular dominance tests preoperatively and 1 and 3 months postoperatively. Refraction test was carried out before and in 3 months postoperatively. Each patient was recorded contrast sensitivity and accepted the survey on visual quality satisfaction in postoperative 3 months.       Results         Ocular dominance change was found in 13 patients (28.3%) in 1 month after surgery

including 9 patients from group A (33.3%) and 4 from group B (21.1%)

and in another 11 patients (23.9%) in 3 months after surgery

containing 7 out of group A (25.9%) and 4 out of group B (21.1%). There was no statistic difference in ocular dominance change between the 2 groups at the 2 time points（

P

0.05）. The myopia diopter was significantly lower in the dominant eyes than non-dominant eyes before surgery (

P

=0.01)

while no statistic difference was seen after surgery (

P

0.05). The contrast sensitivity and visual quality satisfaction had no statistic difference between patients having ocular dominance change or not after surgery（

P

0.05）.        Conclusion        Ocular dominance will change after cataract surgery

but it has no effect on refraction and visual quality. There is no difference between patients of different extent of anisometropia in the change of ocular dominance after cataract surgery.