Abstract: Objective: To investigate the reason,treatment of posterior capsule rapture during phacoemulsification and effects on the vision.Methods: The data of 17 cases with posterior capsule rapture during phacoemulsification were retrospectively analyzed.All cases were divided into group A(11 cases) and group B(6 cases).The posterior capsule rapture of group A and group B occurred during the phacoemulsification,and injection and suction of cortex and intraocular lens implantation,respectively.The visual acuity,intraocular pressure,pupil,location of artificial crystal and fundus between two groups were compared.Results: The differences of corneal edema,anterior chamber reaction and vitreous opacity between two groups were not statistically significant in 1 weeks after operation(P>0.05).The vision acuity in group A was lower than that in group B(P<0.01).The differences of best corrected visual acuity,non-round pupil and incidence of fundus macular edema between two groups were not statistically significant in 3 months after operation(P>0.05).Compared with before operation,the visual acuity of two groups were improved significantly after operation.Conclusions: The timely discovery and treatment of posterior capsule rapture during phacoemulsification can reduce the serious complications,improve the patient's vision and strengthen the confidence of the emulsification beginner.