Comparative study on rotational stability of toric intraocular lenses in cataract patients with low astigmatism: vertical versus horizontal implantation.

Baseline and intraoperative data were comparable between groups.

The LMM revealed significant effects of time, group, and their interaction on rotation angle (all P < 0.001).

Rotation angles were significantly lower in the vertical implantation group than in the horizontal implantation group at all follow-up time points (all P < 0.001).

The vertical group demonstrated better uncorrected visual acuity, BCVA, SE, and lower residual astigmatism (all P ≤ 0.001), along with higher NEI VFQ-25 scores across multiple domains.