The Evaluation Of Rotary Stability Of Acrysof Toric SA60TT Lenses After Phacoemulsification Of Senile Cataract

1. Gleb Fediashev¹
2. Anna Egorova¹

¹"Eye Microsurgery" complex of acad. S. Fedorov, Khabarovsk, Russia

Purpose: The evaluation of rotary stability (RS) of three models of Acrysof Toric SA60TT lenses - T3, T4, T5 after phacoemulsification (PE) in patients with initial corneal astigmatism.

Methods: We observed 37 patients (37 eyes) aged from 35 to 74 years ill with cataract and corneal astigmatism. SA60T3 model of IOL was implanted in 11 cases at the astigmatism less than 1.5 dioptres (D), SA60Т4 IOL was implanted in 12 cases at astigmatism from 1.5 to 2.25 D, and 14 eyes received SA60T5 IOL at astigmatism more than 2.25D. The evaluation of RS was performed 1, 4 and 12 weeks after operation by the method of digital photographing of the anterior segment of the eye, and determining of the angle between the marks on IOL optics and individual landmarks on the iris (pigmental spots, lacunes).

Results: Mean angle of IOL rotation made 2.2±2.0 degrees. The angle of IOL rotation was 10 degrees clockwise in 2 cases, the angle was less than 5 degrees in 18 cases, and no rotation was noticed in 17 cases. There was no statistical significant correlation between the indices of RS and models of implanted IOLs.

Conclusions: Acrysof Toric SA60TT IOL retains high rotary stability of its position in capsular bag for a long time. The critical angle of IOL rotation (10 degrees) which could entail the decrease of visual functions was noticed only in 5% of cases.