Influence Of Sutureless Scleral Fixation Techniques With 3-Piece Iols On Dislocation Force

Published 2024 - 42nd Congress of the ESCRS

Reference: PP12.15 | Type: Free paper | DOI: 10.82333/ze00-4q64

Authors: Johannes Zeilinger* ¹ , Martin Kronschläger ¹ , Andreas Schlatter ¹ , Manuel Ruiss ¹ , Natascha Bayer ¹ , Oliver Findl ¹

¹Department of Ophtalmology, Hanusch Hospital,VIROS - Vienna Institute for Research in Ocular Surgery,Vienna,Austria

Purpose

This experimental laboratory investigation was designed to compare four different secondary IOL fixation techniques, regarding the least required force to dislocate a scleral fixated 3-piece IOL, in human corneoscleral donor tissue (CST).

Setting

Vienna Institute for Research in Ocular Surgery (VIROS), a Karl-Landsteiner Institute, Vienna, Austria.

Methods

The least required dislocation force (LRDF) of four different secondary IOL fixation techniques, namely the techniques using transscleral tunnels (TT, as described by Scharioth), glued haptics (GH, Argawa), flanged haptics (FH, Yamane) and bent haptic ends (BH, Behera/Bolz) were investigated using 40 three-piece IOLs (Sensar AR40) fixated to human scleral tissue. The main outcome of the study, dislocation force between different techniques, was measured with a tensiometer.

Results

The dislocation force needed to dislocate the haptics was highest with the FH technique and was significantly higher than with all the other techniques (GH vs FH: -1.02±0.02 N, p<0.001; TT vs FH: -1.08±0.21 N, p<0.001; BH vs FH: -1.00±0.25 N, p=0.044). There was no significant difference regarding the dislocation force between the other techniques (GH vs TT (-0.06±0.100 N, p=0.988), GH vs BH (-0.02±0.03 N, p=0.60), TT vs BH (-0.08±0.04 N, p=1.000).

Conclusions

The flange haptic technique as described by Yamane proved to be the strongest form of secondary IOL fixation regarding dislocation force in this in vitro study. The other fixation techniques showed significantly less resistance to axial traction.