Posters

Visual acuity and optical imaging quality in one monofocal and five diffractive multifocal intraocular lenses

Poster Details

First Author: M. Gil SPAIN

Co Author(s):    F. Vega   M. Varon   G. Cardona   M. Millan   J. Buil        

Abstract Details

Purpose:

To compare objective image quality at distant, intermediate and near foci with the corresponding visual acuity (VA) in patients symmetrically implanted with five different diffractive multifocal intraocular lenses (MIOLs) (ReSTOR SV25T0, Tecnis ZKB00, Tecnis ZLB00, ATLISA809 and ATLISATri 839MP) and a monofocal lens (Tecnis ZA9003), three months after cataract intervention.

Setting:

Santa Creu and Sant Pau Hospital, Barcelona, Spain and Applied Optics research lab, Universitat Politècnica de Catalunya, Terrassa, Spain.

Methods:

Objective imaging quality for two pupil diameters was tested in-vitro in an eye model. The metric considered was the area under the modulation transfer function curve (AMTF). Corrected distance visual acuity (CDVA), distance corrected intermediate and near visual acuities (DCIVA and DCNVA) were assessed in a group of 172 patients, classified into large and small pupil subgroups.

Results:

Overall, AMTF values were better for small pupils at all foci. Image quality and VA at the distant focus was good for all lens designs, but was similarly compromised at the intermediate focus, where the best DCIVA corresponded to the low add ZKB00. At the near focus and for both pupils, the monofocal lens and the distance dominant SV25T0 had the worst AMTF values, with the ZLB00 presenting the best DCNVA. The relationship between AMTF and visual acuity was nonlinear, with visual acuity being similarly good for AMTF values over a certain threshold.

Conclusions:

Visual acuity of pseudophakic patients reflects the optical quality of the specific IOL design within a certain range of measurements, beyond which maximum visual acuity is limited by other ocular, optical and neuro-psychophysical factors.

Financial Disclosure:

NONE