[Comparative evaluation of positional stability of the «capsular bag + intraocular lens» complex in patients with lens subluxation].

Unlabelled: Prevention of decentration and dislocation of the "capsular bag + intraocular lens" (IOL) complex in the late postoperative period is an actual problem of surgical treatment of patients with pronounced lens subluxation.

Purpose: To conduct a comparative clinical study of positional stability of the "capsular bag + IOL" complex in the late postoperative period after application of a combined technique of capsular bag fixation in patients with subluxation of the lens.

Material And Methods: Phacoemulsification (PE) with in-the-bag IOL implantation and postoperative observation was performed in 213 patients (234 eyes) with cataract and pronounced lens subluxation. The 1 group consisting of 138 patients (153 eyes) underwent capsular bag fixation of the combined technique with simultaneous use of 4 modified iris-retractors and one or two capsular tension rings (CTRs). The 2 group included 75 patients (81 eyes) who in the course of PE had their capsular bag fixed beyond the edge of capsulorhexis with only 4 modified iris-retractors. Preoperative state of the lens and the evaluation of the frequency and degree of decentration of the «capsular bag + IOL» complex in the postoperative period were performed using data acquired with ultrasound biomicroscopy (UBM).

Results: Significant (more than 1 mm according to UBM) IOL's optic decentration was observed in the 1 group after applying the combined capsular bag fixation technique in 12 (7.8%) cases, and in the 2 group after isolated use of modified iris-retractors in 48 (59.3%) cases.

Conclusion: The use of the combined capsular bag fixation technique not only improves the conditions for carrying out PE with in-the-bag IOL implantation in patients with pronounced lens subluxation, but also contributes to a substantial (an average of 8 times) reduction in the incidence of significant decentration of the «capsular bag + IOL» complex in the late postoperative period.