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J. J. Castro, J. R. Jiménez, E. Hita, C. Ortiz; Interocular Differences in Strehl Ratio Diminish Binocular Visual Performance. Invest. Ophthalmol. Vis. Sci. 2009;50(13):1577.
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The aim of this work is to determine the influence of interocular differences in retinal-image quality on binocular visual performance.
We measured contrast sensitivity function (both monocular and binocular) and maximum disparity. From contrast sensitivity data we computed binocular summation. Maximum disparity was measured with a mirror stereoscope showing random dot stereograms (RDS) to the observers. Data on retinal-image quality were taken from a double-pass device (OQAS), providing the Strehl ratio as a parameter to quantify retinal-image quality. 25 observers took part in the experiments.
Binocular summation for contrast sensitivity function and maximum disparity are significantly (p<0.01) correlated with interocular differences in Strehl ratio. The higher the interocular differences in Strehl ratio the lower the maximum disparity and the binocular summation.
Binocular vision, the normal state of vision, is less effective as the interocular differences in retinal-image increase.
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