Toric lens implantation in cataract surgery: Automated versus manual horizontal axis marking, analysis of 50 cases

The main objective of our study was to evaluate the contribution of automated conjunctival registration in the alignment of toric intraocular lenses by comparing automated registration optimized with Callisto® to manual marking of the horizontal axis. We performed a prospective, descriptive, monocentric study on patients undergoing cataract surgery with a toric intraocular lens (Asphina 709 Zeiss), performed by a surgeon with good experience in toric implants, between September 2016 and March 2017. We analyzed the agreement between the manual marking of the 0–180° axis versus the one automatically generated by the Callisto™, as well as the alignment of the IOL and the refractive results at 1 month. We included 50 eyes of 38 patients. The mean corrected astigmatism was 1,9 D. The mean difference between the 2 axes was 4,7° [0–12.3°]. Only 50 % of the preoperative manual markings were consistent with the automated measurement (