Rotational Stability Of The Rayner Rayone Emv Toric Iol

To evaluate the rotational stability of the Rayner RayOne EMV toric IOL (RAO210T), an enhanced spherical aberration intraocular lens (IOL).

Private practice, Melbourne, Victoria

Patients undergoing uncomplicated cataract surgery with implantation of the RayOne EMV Toric IOL were included in this retrospective audit. 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.

38 eyes of 25 patients were included. Mean absolute IOL rotation was 1.4° ± 2.1° at 1 day (n= 27 eyes) and 1.3° ± 1.5° at 3 weeks (n= 34 eyes) post-operatively. Absolute IOL rotation was ≤ 5° in 92.6% of eyes (25/27) and 100% of eyes (34/34) at 1 day and 3 weeks post-operatively respectively. At the 3 week timepoint, the deviation of the IOL from its intended rotational position was small and anti-clockwise in 32.4% of eyes, clockwise in 20.6% of eyes, and no rotation was observed in 47.1% of eyes. No eyes from this series required additional surgical procedures to optimise the toric alignment of the IOL.

The Rayner RayOne EMV Toric IOL demonstrated excellent rotational stability. No secondary IOL rotation procedures were required.