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Toric IOL improves visual outcomes in cataractous astigmatic eyes

J Refract Surg. 2011;27(1):56-62.

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Implanting a toric IOL in eyes with cataract and astigmatism led to improved visual outcomes in both complex and uncomplicated eyes, a study found.

In the retrospective case study, researchers evaluated 230 eyes of 162 adult patients implanted with AcrySof toric IOLs (Alcon).

Overall, 120 eyes (52%) were deemed uncomplicated before surgery, and 110 eyes (48%) were deemed complex due to existing conditions, including age-related macular degeneration, glaucoma and high astigmatism requiring limbal relaxing incisions.

Preoperatively, overall corneal astigmatism was 1.6 D, which improved to an overall residual cylinder of 0.4 D at 6-week follow-up (P < .01). The uncomplicated group had a lower residual cylinder (0.3 D) than the complex group (0.5 D), which included the limbal relaxing incision subgroup (0.8 D); the difference was statistically significant (P < .01).

Uncorrected distance visual acuity was at least 20/20 for 26% of uncomplicated eyes and 16% of complex eyes (P = .05). However, no eyes lost Snellen lines of uncorrected distance visual acuity, except those "with intentionally targeted myopic postoperative spherical equivalent," the study authors said. Uncorrected distance visual acuity improved an average of 0.8 logMAR.

In addition, only 3% of eyes showed significant posterior capsule opacification that was moderate, dense or capsulotomized, and the condition was more common in complex eyes.