AIM:To evaluate the application value of a capsular tension ring (CTR) in high myopia cataract surgery associated with low diopter intraocular lens (IOL) implantation.·METHODS:Five hundred and forty-nine eyes of 427 patients with high myopia cataract had an implantation of a CTR during phacoemulsification associated with IOL implantation surgery.During 3-18 months’ follow-up,visual acuity,intraocular pressure (IOP) and the anterior segment of eyes were measured by slit-lamp microscope.·RESULTS:No IOL decentration was found.Postoperative visual acuity with correction greater than 0.8 in 43 eyes,0.6-0.8 in 118 eyes,0.5 in 89 eyes,0.4 in 101 eyes,0.3 in 66 eyes,0.2 in 80 eyes,less than 0.2 in 52 eyes at 3 months postoperatively.IOP of 549 eyes was 3-47mmHg at first day postoperatively,increase of IOP was found at 179 eyes only for a short time.CTR was removed from intraocular in 1 cases due to IOP increase beyond control.Retinal detachment was found in 2 cases at 18 months postoperatively.YAG laser posterior capsulotomy in 5 cases was performed due to posterior capsular opacity.·CONCLUSION:In eyes with either zonular dehiscence or weakness,application of CTR in high myopia cataract surgery associated with low diopter IOL implantation operation can prevent zonular dehiscence and IOL decentration and tilt,and may lead to prevent posterior capsular opacity and retinal detachment.