Toric IOL helps to reduce keratometric astigmatism, increase spectacle independence

J Cataract Refract Surg. 2011;37(2):235-240.

Keratometric astigmatism was reduced and spectacle independence was increased after cataract surgery and toric IOL implantation, according to a study.

"Astigmatism correction using toric IOLs is imperfect," the study authors said. "Our results show that the T-flex 623T toric IOL effectively reduced visually significant keratometric astigmatism and spectacle dependence after cataract surgery."

The study enrolled 33 eyes of 25 patients with 2 D or more of pre-existing corneal astigmatism. All patients received phacoemulsification and were implanted through a 2.8-mm astigmatically neutral incision with a T-flex 623T toric IOL (Rayner).

Uncorrected and corrected distance visual acuity, refraction, keratometry and cylinder axis of the toric IOL were documented.

At 4 months, mean uncorrected distance visual acuity was 0.28 D logMAR and corrected distance visual acuity was 0.19 D logMAR, the authors said. The mean reduction in refractive astigmatism was 2.94 D.

At 4 months, all patients were within 15° of intended axis and 91% were within 10°, according to the study.

There were no cases of significant IOL rotation in the capsular bag 4 months after surgery, the authors said.