Effect of Toric Intraocular Lens Implantation on Astigmatism in Cataract Surgery

Abstract

Purpose: To evaluate the efficacy of Tecnis® toric intraocular lens (IOL) implantation for the correction of astigmatism and rotational stability during cataract surgery in patients with cataract and astigmatism. Methods: We prospectively analyzed 17 eyes of 14 patients with 1 to 4 diopters (D) of corneal astigmatism who underwent phacoemulsification and Tecnis ® toric IOL implantation at Seoul National University Hospital from June 2013 to May 2014. Informed consent was obtained from all participants before the clinical trial. We evaluated the changes in visual acuity, refraction, astigmatism, IOL axis and higher order aberration for 3 months postoperatively. Power vector analysis was used to analyze astigmatism. Results: The mean uncorrected visual acuity (log MAR) significantly improved from 0.58 ± 0.34 to 0.26 ± 0.43 at 3 months postoperatively. The mean refractive astigmatism was significantly decreased by 77.9% from a mean value of -2.67 ± 0.89 D to -0.59 ± 0.48 D at 3 months postoperatively. According to power vector analysis, M, B, J0, and J45 were significantly reduced after the surgery. The mean difference between achieved and intended IOL axis was 3.26 degrees clockwise at postoperative 3 months, which was statistically insignificant. Most of the rotational changes were observed within a month after the surgery. Conclusions: Phacoemulsification and Tecnis® toric IOL implantation in patients with cataracts and astigmatism showed efficacy for the correction of astigmatism and rotational stability. J Korean Ophthalmol Soc 2015;56(10):1544-1551