Influence Of An Updated Frosted Haptic Design On The Rotational Stability Of The Tecnis Toric Ii Iol Platform

Published 2024 - 42nd Congress of the ESCRS

Reference: FP14.06 | Type: Free paper | DOI: 10.82333/bwnq-0560

Authors: Georgia Cleary* ¹

¹Surgical Ophthalmology Service,Royal Victorian Eye and Ear Hospital,Melbourne,Australia

Purpose

To evaluate the post operative rotational stability of the TECNIS Toric II IOL, with new generation frosted haptics, compared with its predecessor, the TECNIS Toric IOL.

Setting

Private practice, Melbourne, Victoria

Methods

Retrospective, comparative case series. Consecutive patients undergoing uncomplicated cataract surgery with implantation of a monofocal toric IOL, the Tecnis Toric IOL (ZCT), followed by the new generation IOL with frosted haptics, the Tecnis Toric II IOL (ZCU), were included. Biometry was performed with the Zeiss IOLMaster 700, using the Barrett Universal II formula (TK). The IOL toric power was selected to achieve the lowest magnitude of post-operative predicted refractive astigmatism. IOL alignment was achieved intraoperatively using the Zeiss Callisto EYE digital toric alignment system. Post-operatively, the position of the toric IOL was assessed by manual measurement on the slit lamp, at 1 day and 3 weeks post-operatively.

Results

164 eyes were implanted with the ZCT, 113 eyes were implanted with the ZCU IOL.

For ZCT, median (range) absolute IOL rotation was 4.0°(0-88°) at 1 day (n=111 eyes) and 6.0°(0-88°) at 3 weeks (n=48) post-op. Absolute IOL rotation was ≤5° in 55.9%(62/111) and 43.8%(22/48) at 1 day and 3 weeks respectively. Two eyes returned to theatre for IOL rotation.

For ZCU, median (range) absolute IOL rotation was 1.0°(0-8°) at 1 day (n=76) and 0.0D°(0-10°) at 3 weeks (n=74) post-op. Absolute IOL rotation was ≤5° in 85.5%(65/76) and 94.6%(70/74) at 1 day and 3 weeks respectively. No eyes required rotation additional procedures.

Absolute IOL rotation was significantly lower for ZCU at 1 day (P<0.0005) and 3 weeks (P<0.0005) post-op.

Conclusions

Toric IOL alignment was statistically significantly more accurate with the Tecnis Toric II IOL (ZCU) with an updated frosted haptic design, compared with its predecessor at 1 day and 3 weeks post-operatively. No eyes implanted with the Tecnis Toric II IOL (n=113) required secondary rotation procedures.