# Correlation of Biometric Parameters With Endothelial Distance in EVO ICL Phakic Lens Implantation

## TL;DR

This study examines how biometric parameters relate to the positioning of EVO ICL lenses in the eye after surgery.

## Contribution

The study identifies specific correlations between biometric parameters and postoperative lens positioning in EVO ICL implantation.

## Key findings

- GAP values increased from 1 week to 1 month post-surgery (2.5 ± 0.2 mm to 2.6 ± 0.2 mm).
- GAP correlated positively with preoperative anterior chamber volume and other anatomical parameters.
- GAP is a postoperative measure and does not directly define correct lens positioning.

## Abstract

Purpose: The correlations between different parameters and the positioning of the EVO ICL were analyzed. Significant correlations were observed, highlighting the relationship between the endothelium and the anterior surface of the phakic ICL lens. However, it is important to note that GAP is only a postoperative measure and cannot be used to directly define the correct positioning of the EVO ICL. The study emphasizes these correlations, without drawing conclusions regarding the causal relationships between the parameters.

Methods: In this retrospective, observational, transversal analytic study, patients who underwent refractive surgery with implanted EVO ICL pIOL were analyzed. The distance between corneal endothelium and anterior surface of ICL (GAP) was measured postoperatively at 1 week and 1 month using ANTERION AS-OCT.

Results: 35 eyes of 35 patients were analyzed. The mean GAP values at 1 week and 1 month were 2.5 ± 0.2 mm and 2.6 ± 0.2 mm, respectively (p = 0.002), increasing its value. The GAP value correlated positively with preoperative anterior chamber volume, white-to-white, lens vault, spur-spur distance, anterior chamber angle distance, and anterior chamber angles values.

Conclusions: The correlations between GAP and pre- and postoperative variables highlight its relationship with anterior segment anatomy after EVO ICL implantation. However, as a postoperative measurement, GAP does not determine the correct positioning of the lens.