AUTHOR=Ding Ning , Song Xudong , Wang Xiaozhen , Wei Wenbin 

TITLE=Comparison of Visual Outcomes Between Toric Intraocular Lenses and Clear Corneal Incisions to Correct Astigmatism in Image–Guided Cataract Surgery

JOURNAL=Frontiers in Medicine

VOLUME=Volume 9 - 2022

YEAR=2022

URL=https://www.frontiersin.org/journals/medicine/articles/10.3389/fmed.2022.837800

DOI=10.3389/fmed.2022.837800

ISSN=2296-858X

ABSTRACT=Purpose: To compare the astigmatism correction effects of toric intraocular lenses (IOL) and clear corneal incisions during image-guided cataract surgery.
Methods: All patients with regular corneal astigmatism of 0.75–1.5 D underwent cataract surgery and astigmatism correction using the Callisto eye image-guided system. One group had implantation of an AcrySof toric IOL. Another group had implantation of aspheric IOL with 3.0 mm single clear corneal incision (SCCI) on the steep axis. Uncorrected and best-corrected spectacle visual acuity, refraction and toric IOL axis were evaluated at 1, 4, 12 weeks postoperatively. 
Results: Sixty-eight eyes of 68 patients were included. The mean residual refractive cylinder was 0.34±0.40 D in toric group and 0.64±0.57 D in SCCI group. There were no significant differences in residual refractive cylinder, spherical equivalent, UDVA and BCSVA between the groups. The percentage of the residual cylinder within ±0.50 D were 75% and 56% for toric and SCCI cases, respectively (P > .1). The mean surgical induced astigmatism vector was 0.61±0.29 D in SCCI group and 1.04±0.38 D in the toric group; the mean magnitude of error was negative (-0.54±0.48 D) and correction index was less than 1.0 (P < .05) in SCCI group. At 3 months, all of toric IOL alignment error were within 5 degrees from the intended axis.
Conclusions: Both toric IOL and SCCI can correct low-and-medium astigmatism effectively with the help of a precise image-guided system.