Comparison between LENSTAR and VERION in toric intraocular lens power calculation

Purpose
To compare and assess the accuracy of both Lenstar T-cone toric platform and Verion in toric intraocular lens (IOL) power calculation regarding postoperative refraction.
Design
The study design was a retrospective one.
Participants and methods
A total of 33 eyes (33 patients) with astigmatism at least 1 D underwent cataract surgery. The eyes included in the study were divided into two groups. Group 1 included 17 eyes where IOL was implanted according to Verion IOL power calculations, and group 2 included 16 eyes where IOL was implanted according to Lenstar T-cone power calculations. The keratometric readings of the 33 eyes of both devices were compared. Postoperative manifest refraction data of all patients that were taken 1 month postoperative were collected. The manifest postoperative refraction values of both groups were compared with both the expected refraction predicted by Lenstar toric T-cone and with that of the Verion.
Results
There were no statistical differences between the two devices used in this study regarding keratometric values. There were no statistical differences between the two devices used in this study regarding neither the final residual postoperative spherical refractive error nor the final residual postoperative cylindrical refractive error, nor the final residual postoperative spherical equivalent.
Conclusion
Both the Lenstar LS 900 T-cone biometer and the Verion image-guided system provide excellent, accurate, reproducible, and comparable postoperative results.