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Quality of vision after bilateral multifocal intraocular lens implantation

Poster Details

First Author: E.Stangogianni GREECE

Co Author(s):    C. Stangogianni                    

Abstract Details


To evaluate the visual quality after bilateral implantation of diffractive, refractive, apodized aspheric multifocal intraocular lens (IOL) with a +2,50 diopter addition (add) power.


LASERLENS, Ioannina-Greece


This is a cohort, prospective, longitudinal, descriptive and interventional study, comprised 30 eyes of 15 cataract patients who were underwent phacoemulsification and implanted a diffractive, refractive, apodized AcrySof ReSTOR® (SV25T0) intraocular lens, with a follow-up period of 1 year. Patients were selected according: age, gender and occupation, a complete ophthalmologic evaluation and further studies were performed: optical biometry (LENSTAR)®, specular microscopy, contrast sensitivity (CVS-1000E VectorVisionTM®), wave- front aberration (Zywave, B&L). Statistical analysis was performed using nonparametric analysis (Levene's test and ANOVA). A significance level of p ≤ 0.05 was established.


Of the sample, 69.23% were female and the average age was 69,06±11,12 years. Visual acuity were assessed in LogMar, the uncorrected distance vision (0.27 ± 0.16), uncorrected intermediate vision (0.15 ± 0.08) and uncorrected near vision (0.20 ± 0.05) were significantly improved (One Way ANOVA p=0.00). Contrast sensitivity, increase in all spatial frequencies ROW (CPD) (One Way ANOVA p=0.00). The higher order aberrations such as coma was small and is marked by the pupil and the distance to the nodal point, also the spherical aberration had no statistically significant change. The low-order aberrations (defocus) were unaffected (ANOVA p=0.181).


The SV25T0 IOL presented an improvement in the quality of vision suggesting an adaptation by the patient and sometimes visual distortions as coma and secondary astigmatism can occur, especially if there is an alteration of the tear film, tilt or decentration of the lens.

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