Refractive Results and Intraoperative on-Axis Markless Alignment of Trifocal Toric IOL With Electronic Online Image-Processing System
To compare refractive outcome, residual astigmatism and ease of on axis implantation of an trifocal toric IOL without and with help of electronic alignment.
Retrospective study of 40 patients for cataract surgery, having an astigmatism of ≥1,00 dpt and had spectacles for far and near. Selection of the patients was directed by their desire to see without glasses fare and near. Biometric data were performed with the IOL-Master, phacoemulsification and IOL implantation, marker less IOL – positioning under the Lumera 700 microscope and the callisto system, follow-up of 3 months to control visual acuity for far, intermediate and near and refractive outcome. Electronic registration of on axis implantaton had been used, time for centration had been registered. A questionnaire was used for evaluation of patients satisfaction.
All patients had at least UCFVA of 20/50 and UCNVA 20/30, all could be corrected with glasses to 20/20 or better. One IOL had to be rerotated after again marker less alignment. Gain in smoother flow of patients and gain in a sterile procedure with marker less alignment is demonstrated. Intraoperative paracenthesis in the stepest meridian helped post-operative control of intended IOL-axis.
The trifocal toric AT LISA IOL gives good correction of the corneal astigmatism. There is a very high rate of spectacle independence for fare and near vision in both groups. Electronic help for marking of the implantation axis made the workflow more easy and safe.