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Effect of multizone refractive multifocal lenses on standard automated perimetry

Poster Details

First Author: A.Lorente-Velazquez SPAIN

Co Author(s):    L. Isla Paradero   D. Madrid Costa   C. Albarr   R. Mont     

Abstract Details


To evaluate whether the creation of two foci (distance and near) provided by multizone refractive multifocal lenses for presbyopia correction affects the measurements on Humphreys 24-2 Swedish Interactive Threshold Algorithm (SITA) standard automated perimetry (SAP)


University of Valencia


In this cross-over study, 30 subjects were fitted in random order with either a multifocal contact lens (CL) or a monofocal CL. After 1 month, a Humphrey 24-2 SITA standard strategy was performed. The visual field global indices (the mean deviation (MD) and pattern standard deviation (PSD)), reliability indices, test duration and number of depressed points deviating at p< 5%, p< 2%, p< 1% and p < 0.5% on pattern deviation probability plots were determined and compared between multifocal and monofocal CLs.


30 eyes of 30 subjects were included in this study. There were no statistically significant differences in reliability indices or test duration. There was a statistically significant reduction in MD with the multifocal CL compared to monfocal CL (P= 0.001). Differences were not found in PSD neither on the number of depressed points deviating at P <5%, P<2%, P<1% and P<0.5% on the pattern deviation probability maps studied.


The results of this study suggest that the multizone refractive lens produces a generalized depression in threshold sensitivity as measured by the Humphreys 24-2 SITA SAP. FINANCIAL DISCLOSURE?: No

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