Risk Factors and Surgical Techniques for Pars Plana Vitrectomy of Posteriorly Dislocated Intraocular Lenses

Abstract

Introduction: IOL is a rare but serious complication of cataract surgery that may necessitate PPV for anatomical and visual recovery.

Objective: To determine the risk factors of posteriorly dislocated IOLs and the surgical outcomes of PPV.

Methods: This was a retrospective, observational study carried out at the Quetta Institute of Medical Sciences Quetta, Balochistan, over a period of six months (November 2025-April 2026) on 60 patients who were undergoing treatment for posterior IOL dislocation with PPV, selected by non-probability consecutive sampling.

Results: Mean age was 61.8 ± 8.7 years, with male predominance (60.0%). Delayed in-the-bag dislocation was the most common cause (40.0%), followed by complicated cataract surgery (25.0%), trauma (20.0%), and pseudoexfoliation (15.0%). The most frequently used technique was scleral fixation (35.0%), followed by repositioning (31.7%). Anatomical success rate was 95.0%, and ≥ 2 Snellen lines were obtained in 80.0% of eyes. Mean BCVA improved from 1.08 ± 0.36 to 0.42 ± 0.31 logMAR. Transiently raised IOP (10.0%), cystoid macular edema (8.3%), and retinal detachment (3.3%) were complications, but there was no endophthalmitis.

Conclusion: PPV is a safe and effective method of the management of posteriorly dislocated IOLs with high anatomical success and a good improvement in visual acuity, especially when predisposing risk factors are identified early.