First Author: A.Lorente-Velazquez SPAIN
Co Author(s): L. Isla Paradero D. Madrid Costa C. Albarr R. Mont
Purpose:
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)
Setting:
University of Valencia
Methods:
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.
Results:
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.
Conclusions:
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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