Intraocular lens alignment methods.

PURPOSE OF REVIEW: This article reviews current concepts in intraocular lens alignment strategies to maximize intraocular lens (IOL) positioning. RECENT
FINDINGS: A variety of strategies has been developed to maximize toric IOL position, including preoperative calculators to determine the appropriate IOL power and orientation, intraoperative alignment devices, and postoperative software to determine if IOL rotation would be beneficial for refractive outcomes.
SUMMARY: The combination of using multiple toric IOL calculators and intraoperative alignment devices has improved toric IOL outcomes. The relationship of the posterior corneal power and its effect on outcomes remains to be fully elucidated. Postoperative IOL rotation may be necessary even when the IOL is aligned as planned because of surgically induced astigmatism.