Alexander Miller1*, Matthew Hirabayashi1, Timothy Ritchie1, Eli Pratte1, Samuel Barry1, Jella An2
Purpose: To determine the astigmatism correcting potential of Limbal Relaxing Incisions (LRI) at the time of cataract surgery compared to cataract surgery with monofocal or toric IOLs. Design: Retrospective chart review. Subjects, participants and/or controls: 150 eyes from patients who underwent cataract surgery and either: LRI with monofocal IOL implantation, toric IOL implantation or monofocal IOL implantation.
Methods: A retrospective review of adult patients who underwent cataract surgery between 12/05/17 and 05/11/21. To compare change in astigmatism between the groups, pre-operative keratometry values were compared to postoperative manifest refractions. Astigmatism was plotted on double angle plots for further visualization. Main outcome measures: The primary outcome measure was achievement of postoperative astigmatism of <1.00 D.
Results: 44% (22/50) of LRI eyes and 80% (40/50) of toric eyes achieved a residual postoperative astigmatism of <1.00 D (P<.002). Similarly, 16% (20/50) of LRI eyes and 40% (20/50) of toric eyes achieved a residual postoperative astigmatism of <0.50 D (P<.014). Mean astigmatism resolution in our sample was 1.12 D ± 0.76 D in the LRI group, 0.53 D ± 0.43 D in the toric group and 0.73 ± 0.61 in the standard IOL group.
Conclusion: The toric group resulted in lower rates of post-operative astigmatism as compared to the LRI group. The standard IOL group had a low rate, but they also had a low rate pre-operatively.1
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