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Comparative analysis of tolerance to postoperative residual refractive error after implantation of trifocal Finevision and extended-range-of-vision Symfony intraocular lenses

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Session Details

Session Title: EDOF vs Multifocal IOLs

Session Date/Time: Sunday 23/09/2018 | 14:15-16:00

Paper Time: 14:50

Venue: Room A4

First Author: : L.Zabala PORTUGAL

Co Author(s): :    T. Ferreira   F. Ribeiro                 

Abstract Details


To compare the impact of induced astigmatism with two different types of presbyopia correction intraocular lenses PC IOLs, the trifocal finevision and the extended-range-of-vision, symfony.


Hospital da Luz, Lisboa, Portugal


The study comprised 60 eyes of cataract patients with implantation of Trifocal Finevision (Physiol) n=30 and Extended Range of Vision, Symfony (Tecnis) n=30, three months previously. All eyes achieved BCVA of 20/20 or better. Astigmatism was induced by the addition of positive and negative astigmatic lenses in the trial frame, from 0,25 D up to 1,5D in 0,25 steps, at 90º and 180º. BCVA and patient satisfaction was recorded at each step. It was considered the minimum power of induced astigmatism required to reduce 1 line of BCVA and patient dissatisfaction.


Simulated residual astigmatism up to 0,5 D has no significant impact on VA or patient satisfaction in both groups regardless of the sign or the axis. Positive astigmatism at 180º has greater impact on VA in both groups. Astigmatism <1 D reduce 1 line of BCVA in the trifocal group but only cylinders >1 D reduce patient satisfaction. The tolerance of 1 D of astigmatism is better in the EDOF group (p<0.05). Patient in the EDOF group tolerated up to 1,5 D of induced cylinder.


Simulated residual astigmatism up to 1,00 D regardless sign or axis has no significant impact on VA or patient satisfaction in both groups. The EDOF IOL shows better tolerance to residual astigmatism >1,00 D preserving good VA and patient satisfaction. The impact of the residual astigmatism is more significant in the IOL that distributes light for a greater number of foci. Correction of postoperative unexpected residual astigmatism should be considered >1,00 D in the FineVision IOL and >1,50 D in the Symphony IOL.

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