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Toric IOLs offer positive visual outcomes in eyes with high astigmatism

J Cataract Refract Surg. 2011;37(8):1403-1410.

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Four new iterations of a toric IOL currently available in Europe were effective in correcting high degrees of corneal astigmatism, a study found.

The study highlighted four AcrySof toric IOLs (Alcon): SN60T6, SN60T7, SN60T8, and SN60T9.

“We believe that implantation of an AcrySof toric IOL is an effective and safe method to correct high amounts of corneal astigmatism during cataract surgery,” the study authors said.

The prospective, nonrandomized clinical trial included 67 eyes of 45 patients. Mean patient age was 65 years. All patients had more than 2.25 D of corneal astigmatism. Standard phacoemulsification and IOL implantation were performed through a 2.2-mm limbal incision.

Mean preoperative logMAR corrected distance visual acuity was 0.38.

Postoperative examinations were performed at 1 month, 3 months and 6 months. Mean follow-up was 6.3 months.

Study results showed that mean postoperative uncorrected distance visual acuity was 0.61 and mean corrected distance visual acuity was 0.81. Uncorrected distance visual acuity was 20/40 or better in 83% of eyes and 20/30 or better in 50% of eyes.

Residual refractive cylinder was less than 0.75 D in 62% of eyes and less than 1 D in 81% of eyes.

Mean IOL misalignment was 3.2·. Mean surgically induced astigmatism was –0.40 D with a superior incision and -0.19 D with a temporal incision. The difference was statistically significant (P = .034), the authors reported.