Early intraocular lens explantations: 10-year database analysis

Area of Science:

• Ophthalmology
• Medical Device Analysis
• Surgical Outcomes

Background:

• Analyzing intraocular lens (IOL) explantation within the first year of primary implantation is crucial for understanding device performance and patient safety.
• Early explantation can indicate issues with IOL design, surgical technique, or patient factors.

Purpose of the Study:

• To determine the primary causes and characteristics of intraocular lens (IOL) explantation within one year of initial implantation.
• To identify specific IOL types and patient factors associated with early explantation events.

Main Methods:

• Retrospective analysis of a large database (over 2500 explants) from 199 international contributors over 10 years.
• Inclusion criteria focused on IOLs explanted within the first year, excluding those with insufficient data, phakic, or Add-on IOLs.
• Key outcomes included reasons for explantation, time to explantation, and patient/IOL characteristics, supplemented by microscopic and histological analysis.

Main Results:

• 1.9% (50/2500+) of explanted IOLs were removed within the first year.
• Leading causes were IOL dislocation (32%), visual intolerance (26%), opacification (20%), and intraoperative complications (16%).
• Opacification was primarily due to hydrophilic IOL calcification (80%); intraoperative complications led to the shortest explantation times (1.5 days).

Conclusions:

• IOL dislocation, visual intolerance, opacification, and intraoperative complications are key indications for early IOL explantation.
• Intraoperative IOL damage and early calcification highlight areas for potential improvement in IOLs and implantation systems.
• Further research into IOL material science and surgical protocols may reduce the incidence of early explantation.