Late in-the-bag intraocular lens dislocation in eyes with pseudoexfoliation syndrome

Abstract. Purpose: To assess preoperative features, frequency, surgical approaches and outcomes of late in-the-bag dislocation of posterior chamber intraocular lenses (IOLs) in eyes with pseudoexfoliation syndrome. Methods: Seventy-seven patients (81 eyes) were enrolled. Inclusion criteria were patients with pre-existing pseudoexfoliation syndrome who underwent surgery for late in-the-bag IOL dislocation between March 2004 and April 2010. Medical records were reviewed. Data from before and after secondary surgery were analysed. Results: Mean time between cataract extraction and secondary surgery for late in-the-bag dislocation of posterior chamber IOLs was 8.5 years. The increase in frequency within the reviewed period was statistically significant, ranging from six patients in the first year to 25 patients in the final year (p = 0.004). When surgical correction was performed within 1 month of referral, deterioration of the dislocation occurred in only one of 23 patients (4.3%). Complications, especially vitreous loss, occurred significantly more frequently during exchange surgery (n = 23) when compared with scleral suturing (n = 50) (p < 0.0001). After surgery, however, no differences in complications (p = 0.98) or best-corrected visual acuity (p = 0.74) was found. In general, following secondary surgery, there was a statistically significant improvement in best-corrected visual acuity (p < 0.0001). Conclusion: The frequency of late in-the-bag dislocation of posterior chamber IOLs in eyes with pseudoexfoliation syndrome increased during the observation period. Our study suggests that surgical repair should not be delayed beyond 1 month and that scleral suturing is preferable to exchange surgery, because of less intraoperative complications.