Data from: Clinical efficacy of implantation of toric intraocular lenses with different incision positions: a comparative study of steep-axis incision and non-steep-axis incision

Background: To compare the clinical outcomes after implantation of AcrySof
Toric IOLs with different clear corneal incisions. Methods: Sixty cataract
patients with regular corneal astigmatism who underwent
phacoemulsification combined with implantation of an AcrySof Toric IOL
were enrolled. They were divided into two groups according to the position
of the clear corneal incision: steep-axis and non-steep-axis. Main outcome
measurements included visual acuity, residual astigmatism and changes of
corneal astigmatism 3 months postoperatively. Deviation of IOL axis
according to the re-calculation using the actual surgically induced
astigmatism (SIA) and visual function 3 months after surgery were also
evaluated. Results: The corneal astigmatism decreased significantly in
steep-axis group 3 months postoperatively (P < 0.05). Besides, more
patients in non-steep-axis group were with irregular corneal astigmatism
after the surgery (43.33% vs 10%, P = 0.004). The deviation of IOL axis
according to the re-calculation using the actual SIA was significantly
larger in non-steep-axis group than that of steep-axis group (P <
0.001). Moreover, the postoperative visual function was better in eyes of
steep-axis group in various measurements, including point spread function,
modulation transfer function and high-order aberrations. Conclusion:
Steep-axis clear corneal incision could reduce the cylinder power of toric
IOL and lower the chance of postoperative irregular astigmatism, which may
consequently improve the postoperative visual quality.