Ultrasound biomicroscopic analysis of iris-fixated foldable intraocular lens

Abstract

Objective To observe the position of iris-fixated foldable lens with ultrasound biomicroscopic (UBM),and evaluate the safety of the operation.Methods Seventeen patients (17 eyes)who had insufficient posterior capsular support for intraocular lens underwent iris-fixated foldable lens implantation.Six months later,UBM was used to determinate the haptic position in relation to ciliary sulcus and ciliary body,the anterior chamber depth (ACD),lens tilt,relationship of the IOL optic to iris and angle abnormalities in these eyes.Main outcome measures were haptic position,ACD and iris anatomic changes.Results Of the 34 haptics,27 (79.4％) were positioned in the ciliary sulcus,5 (14.7％) haptics were found over the ciliary processes,and 2 (5.9％) were over pars plana.Both haptics were in the ciliary sulcus in 11 eyes of the 17 eyes (70.6％).The mean (±standard deviation) ACD was (3.84±0.36) mm.No patients were found to have peripheral anterior synechiae,angle abnormalities or tilted lens.Conclusions Iris-sutured PCIOL haptics are found to be in the ciliary sulcus or over the ciliary body with no lens tilt on UBM analysis.The procedure respects the angle anatomy,and no evidence of angle closure is found.The ACD is similar to that of in-the-bag PCIOLs.This may have implications for surgical technique,IOL power calculations,and postoperative complications. Key words: Ultrasound biomicroscopic; Absence of capsule support; PCIOL; iris-fixated