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The relationship between uncorrected visual acuity at various distances and patient satisfaction after implantation of multifocal IOLs: a comparison between bi-and tri-focal IOLs at 6 months post-op

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Session Details

Session Title: Presented Poster Session: Pseudophakic IOLs

Session Date/Time: Tuesday 08/09/2015 | 09:30-11:00

Paper Time: 09:50

Venue: Poster Village: Pod 3

First Author: : S.Patel UK

Co Author(s): :    A. Barisc   I. Dekaris   N. Gabric   I. Romac   M. Bohac   D. Kovacevic

Abstract Details


To examine the various statistical inter-relationships between uncorrected visual acuity at distance (UCDVA) , intermediate (UCIVA), near (UCNVA) and low contrast (10%) uncorrected distance acuity (UCDVA10%) in patients implanted and with either a bi-or-trifocal IOL and determine if patient satisfaction scores were related to specific aspects of uncorrected visual acuity.


University Eye Hospital,Svjetlost, Zagreb, Croatia


Uncorrected logMAR high contrast visual acuity was measured at distance, near (33cm) and uncorrected visual acuity at an intermediate location was measured with a chart calibrated for use at 80cm. Low contrast (10%) uncorrected acuity was also measured at distance only. All measurements were taken under photopic conditions (85cd/m2). Patients that underwent unremarkable bilateral IOL implantation were asked to rate their satisfaction with their overall quality of vision on a 10 point analogue scale (1= completely dissatisfied, 10=completely satisfied). Patients were bilaterally implanted with either bifocal (AT LISA 809M, Zeiss) or trifocal (AT LISA tri 839M, Zeiss) IOL.


Reporting the key findings at 6months.Multiple comparisons (p less than 0.001) after applying the Bonferroni correction revealed I)Bifocal IOL (n=48), satisfaction was positively correlated with UCDVA (r=0.528) but not with UCDVA10% or UCIVA or UCNVA. II)Trifocal IOL (n=52), satisfaction was positively correlated with UCDVA (r=0.555), UCDVA10% (r=0.681), UCIVA (r=0.471) but not UCNVA. III)UCIVA was significantly better with the trifocal IOL when compared with the bifocal IOL. Mean UCIVA was 0.81(range0.50-1.0) with trifocal and 0.62 (range0.50-0.80). IV)Average satisfaction scores were, bifocal 8.8 (range 2-10) trifocal 9.0 (range 4-10), difference was not significant (p=0.378).


The overall satisfaction was high and the small difference between the two satisfaction scores was not significant. The achieved uncorrected intermediate visual acuity was better with the trifocal IOL and, to some extent, this was expected. In general, the satisfaction with the trifocal IOL was strongly associated with the final achieved uncorrected distance visual acuity at 10% contrast intermediate acuity and to a lesser extent with uncorrected intermediate visual acuity. However, for both IOLs the overall satisfaction score was strongly associated with the achieved uncorrected distance visual acuity not the achieved uncorrected near visual acuity.

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