Kim EC, et al. - Researchers conducted this prospective randomized study to compare the precision of astigmatism correction utilizing automated and manual marking during cataract surgery in toric intraocular lens (TIOL) implantation. For this investigation, 132 eyes with nuclear density from Grade 2 to 4 were randomly subdivided into two groups (automated and manual marking). All study participants had manual marking and the steep axis was compared with SensoMotoric Instruments (SMI). Investigators found that the difference between SMI and manual marking of the intraoperative steep axis was 7.86 ± 6.4 degrees. Investigators found that the distinction between the preoperative steep axis and the postoperative TIOL axis using SMI (3.63 ± 1.12 degrees) was significantly lower than that using manual marking (8.29 ± 2.23 degrees). When using SMI vs manual marking, the steep axis measurements can be distinct. During cataract surgery, the SMI is more precise than manual marking for TIOL implantation.