Using triangular marks of capsulotomy edge for the alignment of Toric IOLs postoperation: a new technique

Background: Accurate alignment of Toric intraocular lens (IOL) axis is vital for achieving the desired astigmatic correction after surgery. We used a pair of triangular incision markers on anterior capsulotomy edge to assess the rotations of Toric IOL axis and compare with conventional manual corneal marker for postoperative follow-up. Methods: Thirty-six cataract patients (39 eyes) were enrolled who underwent phacoemulsification and AcrySof Toric IOL implantation between May 2018 and August 2018. All patients coexist regular corneal astigmatism between 1.0 diopter(D) and 3.0D. The patients were divided to two groups according to the axial length. Axial length less than 26mm was named Group A. The other patients belong to Group B. Triangular incisions of anterior capsulotomy edge and conventional manual corneal marking method were used to measure the rotations of Toric IOL at 1 and 3 months after surgery. Results: The angels of rotation for Toric IOL assessed by the new markers were less at 1 and 3 months for group A when compared with the conventional manual corneal marking but not for group B. There are not any intraoperative and postoperative complications by using the new technique. Conclusion: The triangular markers in anterior capsulotomy edge are more accurate when compared with conventional manual corneal marking method to evaluate the rotation stability of Toric IOL after operation.