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AIM:To investigate the changes of anterior chamber depth(ACD)and lens suspensory ligament after phacoemulsification and intraocular lens(IOL)implantation in patients with ultra-high myopia cataract and related influencing factors.METHODS: A total of 45 patients(60 eyes)with ultra-high myopia and cataract in our hospital from October 2016 to December 2022 were selected. All patients received phacoemulsification and IOL implantation. The patients were randomly divided into implantation group and non-implantation group. Implantation group was combined with capsular tension ring(CTR)implantation, and non-implantation group did not implant CTR during operation. The changes of ACD and lens suspensory ligament length before and after operation were compared and the correlation was analyzed. To observe the differences of ACD and the length of lens suspensory ligament between the two groups before and after operation.RESULTS: The ACD of patients with ultra-high myopia complicated with cataract at 1 and 3mo after operation was higher than that before operation(all P<0.05). The positions of 3:00, 6:00, 9:00, 12:00 and the average length of lens suspensory ligament at 1 and 3mo post-operation were shorter than those pre-operation(all P<0.05). There was no significant difference in the positions of 3:00, 6:00, 9:00, 12:00 and average length of suspensory ligament between 1mo and 3mo after operation(all P>0.05). The preoperative average length of lens suspensory ligament in patients with ultra-high myopia cataract was positively correlated with the ocular axis and the preoperative ACD(all P<0.05). There was no significant difference in ACD between the implantation group and the non-implantation before and at 1 and 3mo after operation(P>0.05). There was no significant difference in the length of lens suspensory ligament between implantation group and non-implantation group at the position of 6:00 before operation and 1mo after operation(P>0.05), but there was difference in lens suspensory ligament between groups at 3mo after operation and the position of 6:00(P<0.05). Furthermore, there was no significant difference at the positions of 3:00, 9:00, 12:00 and the average length of lens suspensory ligament between the implantation group and non-implantation group before and at 1 and 3mo after operation(P>0.05).CONCLUSION: The ACD deepen and lens suspensory ligament shortened in patients with ultra-high myopia and cataract after phacoemulsification; the length of lens suspensory ligament was affected by the combined use of CTR.
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·AIM: To investigate the clinical characteristics of secondary glaucoma caused by lens suspensory ligament laxity or occult subluxation, and to analyze the influence of operation on visual acuity and intraocular pressure (IOP). ·METHODS:Totally 38 cases (38 eyes) of the secondary glaucoma caused by lens suspensory ligament laxity or occult subluxation in ophthalmology department of our hospital from December 2014 to December 2016 were enrolled and their medical records were analyzed retrospectively to observe the clinical characteristics of glaucoma. Preoperative mydriasis was carried out and surgical methods were chosen according to the lenses location and extent of suspensory ligament. Preoperative and postoperative anterior chamber depth, corneal endothelial cell density, IOP, visual field, visual acuity and complications were analyzed. ·RESULTS:The average intraocular pressure was 18.17± 1.43mmHg at postoperatively 10d,which was significantly lower than 38. 77 ± 2. 45mmHg before operation, the difference had statistical significance (P<0.05). The IOP of 25 eyes returned to normal (≤21mmHg) at 3d after surgery. The IOP of 34 eyes with the usage of IOP lowering medication returned to normal at postoperative 10d. The IOP of 4 eyes came to normal after undergoing glaucoma drainage valve implantation again. There were 5 eyes with visual acuity ranged 0.1 to <0.2,17 eyes 0.2 to <0.5,16 eyes≥0.5 preoperatively,and 2 eyes,17 eyes and 19 eyes postoperatively, the difference was not significant (P>0.05). The postoperative anterior chamber depth was 2.45 ± 0.44mm, which was significantly higher than 1.23 ± 0.35mm before operation, the difference had statistical significance (P < 0. 05). The postoperative corneal endothelial cell density was 878.34 ± 322.12/mm2 and decreased significantly, compared with 1735.32 ± 340. 32/mm2before operation, the difference had statistical significance (P<0.05). There were 8 eyes with corneal edema,4 eyes with iris adhesion or varying degrees of atrophy,3 eyes with anterior chamber hemorrhage,and 2 eyes with pupil exudate at 3d after surgery. · CONCLUSION: Clinical symptoms and signs of secondary glaucoma in patients with lens suspensory ligament laxity or occult subluxation are more complex, which needs to be distinguished with other types of glaucoma in clinical treatment, and its surgical methods shall be chosen according to different suspensory ligament site and lens subluxation scope.