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Toric intraocular lens for astigmatism correction in cataract patients

Poster Details

First Author: H.Razmjoo IRAN

Co Author(s):    M. Ghoreishi   A. Peyman   A. Mohamadi        

Abstract Details



Purpose:

To assess clinical consequences of Acrysof toric intraocular lens (IOL) and Hoya toric IOL implantation to correct preexisting corneal astigmatism in patients undergoing cataract surgery.

Setting:

Eye research center, Feiz hospital, Isfahan University of Medical Sciences, Isfahan, Iran

Methods:

In this study we examined 55 eyes of 45 patients with at least 1.00 diopter of corneal astigmatism who scheduled for cataract surgery. After phacoemulsification cataract extraction, a toric IOL (Acrysof toric lens for 30 eyes of 23 patients and Hoya toric IOL for 25 eyes of 22 patients) was implanted and axis was aligned. We observed the patients' uncorrected distance visual acuity, corrected distance visual acuity, keratometry, manifest refraction, and IOL axis alignment six month after surgery.

Results:

After six months, the uncorrected distance visual acuity was 0.17 +/- 0.17 LogMar in Acrysof group and 0.17 +/- 0.18 LogMar in Hoya group. More than 78% of eyes in Acrysof group and 80% of eyes in Hoya toric IOL achieved an uncorrected acuity of 20/40 or better. In Acrysof group, mean preoperative corneal astigmatism was 2.73 +/- 0.92 diopters and the mean post-operative refractive astigmatism was -0.84 +/- 0.63 diopters. In Hoya group, preoperative corneal astigmatism was -2.58 +/- 0.76D and post-operative refractive astigmatism was -0.87 +/- 0.66D. In our study, after 6 month, the mean AcrySof IOL axis rotation was 1.88 +/- 3.05 degrees. IOL alignment of 90.6% was within +/-5 degrees of the operation axis and all within +/- 10 degrees in Acrysof group. In the Hoya group, mean axis rotation was 1.53 +/- 3.66 degrees. IOL alignment of 90% was within +/- 5 degrees of operative axis and 95% within +/- 10 degrees. All changes in visual and refractive data before and after surgery were statistically significant (p<0.05). We were not able to find any statistically significant difference between two groups regarding refractive and visual outcome after surgery (p> 0.05 for all comparisons between groups).

Conclusions:

The results of the study revealed that implantation of Acrysof toric IOL and Hoya toric IOL was an effective way to correct preexisting corneal astigmatism in cataract patients. No significant difference was found between clinical outcomes of these two IOLs. FINANCIAL INTEREST: NONE

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