The clinical study of early post-cataract surgery capsular block syndrome

Abstract

Objective To discuss the causes,prevention and treatment of persistent high intraocular pressure caused by early capsular block syndrome (CBS) after phacoemulsification and intraocular lens (IOL) implantation.Methods 54 patients who developed early postoperative CBS were included in this study.22 cases received anterior vitrectomy and anterior chamber gas injection,19 cases received YAG laser anterior or posterior capsulotomy,13 cases only received medication to drop intraocular pressure.Statistical data was analysed by SPSS 13.0 software package to compare the efficacy of treatment.Results The corrected visual acuity improved after one week of treatment,there was no significant difference between the three groups (P =0.594).The high intraocular pressure relieved,there was significant difference (P =0.048).After three months of follow-up,there was no significant difference between the three groups of corrected visual acuity (P =0.240),but there was significant difference of IOP (P =0.030).Furthermore,there was no significant difference of IOP between the vitrectomy group and laser group (P =0.725),but the IOP of the vitrectomy group and laser group was significantly better than that of medication group (P =0.004,P =0.033).Conclusion The early postoperative CBS can be prevented by expansion of capsulorhexis diameter,selecting appropriate intraocular lens,and improving surgical skills to complete removal of the viscoelastic material.When the medication fails,early operation of anterior vitrectomy and anterior chamber gas injection can effectively reduce intraocular pressure and improve corrected visual acuity,which may achieve the same effect of laser treatment. Key words: Post-cataract surgery; Capsular block syndrome; High intraocular pressure ; Anterior vitrectomy ; YAG laser