Background factors determining the time to intraocular lens dislocation.

Area of Science:

• Ophthalmology
• Surgical Innovation
• Patient Outcomes

Background:

• Intraocular lens (IOL) dislocation is a known complication.
• Understanding the characteristics of late IOL dislocation is crucial for surgical management.
• Suture or intrascleral fixation is a common surgical approach for dislocated IOLs.

Purpose of the Study:

• To characterize late intraocular lens (IOL) dislocations.
• To identify factors associated with IOL dislocation requiring surgical fixation.
• To propose a new classification for specific IOL dislocation timing.

Main Methods:

• Retrospective case series of 21 eyes with IOL dislocation.
• Review of medical records for background diseases, IOL location, capsular tension ring (CTR) use, and time to dislocation.
• Analysis of cases requiring IOL suture or intrascleral fixation.

Main Results:

• The most frequent causes included pseudoexfoliation syndrome, atopic dermatitis, zonular issues, and post-retinal detachment surgery.
• IOLs were dislocated intracapsularly (16 cases) or extracapsularly (5 cases).
• Average time from IOL insertion to dislocation was 13.7 years, with a range of 1.7 to 31.3 years.

Conclusions:

• All cases represented late IOL dislocations (occurring >3 months postoperatively).
• Dislocations occurred in a short-to-medium term, particularly with CTR use and zonular weakness.
• The study proposes classifying these specific late dislocations as intermediate-term IOL dislocations.