Posters

The durability of the haptics of IOLs during extraction or scleral fixation

Poster Details

First Author: K. Kawai JAPAN

Co Author(s):                        

Abstract Details

Purpose:

Breaking of a haptic or a haptic breaking off of an implant has been reported during extraction of a dislocated intraocular lens (IOL) or scleral fixation of an IOL. Thus, the current study examined subjected the haptics of an IOL to a load in order to determine where (in what direction) they were fragile.

Setting:

Department of Opthalmology Tokai University School of Medicine

Methods:

A tester was built to assess the haptics of IOLs. The optic of an IOL was immobilized, a haptic was grasped with forceps, and was subjected to a load to the left and right (x axis: + to the right, － to the left), forwards and backwards (y axis: ＋ forwards, － backwards), and up and down (z axis: + up, － down). The IOLs assessed were hydrophobic acrylic IOLs (VA60BB, SA60AT, N4-11B, and MA60BM), a hydrophilic acrylic IOL (H60M), and silicone IOLs (AQ310NV and ClariFlex)

Results:

Intraocular lenses were subjected to the loads to determine the extent of movement that would result in damage to haptics. The haptic of the N4-11B broke in all 6 examined directions. Damage to the haptic occurred in every SA60AT specimen. Various IOLs were broken with a slight forward movement (4.2 to 7.1 mm) when subjected to a load along the y-axis.

Conclusions:

IOLs were less likely to break when subjected to a load along the right direction (x-axis) or the depth direction (y-axis), but were fragile when subjected to a load along the forward direction (y-axis). Thus, the fragility of IOL haptics when pulling to an unexpected direction must be noted during extraction or scleral fixation of that IOL.

Financial Disclosure:

One or more of the authors receives nonNONEmonetary benefits from a company producing, developing or supplying the product or procedure presented., One or more of the authors research is funded, fully or partially, by a company producing, developing or supplying the product or procedure presented