Influence of interocular differences in the Strehl ratio on binocular summation.
The aim of this work is to determine the influence of interocular differences in retinal image quality on binocular visual performance. We measured the contrast sensitivity function (both monocular and binocular) and we computed binocular summation. Data on retinal image quality were taken from a double-pass device (OQAS, Optical Quality Analysis System; Visiometrics SL. Tarrasa, Spain), providing the Strehl ratio as a parameter to quantify retinal image quality. A total of 28 observers took part in the experiments. Binocular summation for the contrast sensitivity function was found to be significantly (p < 0.001) correlated with interocular differences in the Strehl ratio. The higher the interocular differences in the Strehl ratio, the lower the binocular summation. Binocular summation is less effective as the interocular differences in retinal image increase.
Laboratory of Vision Sciences and Applications, Department of Optics, University of Granada, Facultad de Ciencias (Edificio Mecenas), Avenida Fuentenueva s/n, 18071 Granada, Spain. jjcastro@ugr.es
José J
JJ
Castro
José R
JR
Jiménez
Enrique
E
Hita
Carolina
C
Ortiz
D000328:Adult; D000367:Age Factors; D015350:Contrast Sensitivity / Q000502:physiology*; D019781:Corneal Topography / Q000379:methods*; D006801:Humans; D008875:Middle Aged; D015233:Models, Statistical; D012160:Retina; D012684:Sensory Thresholds; D015348:Vision, Binocular / Q000502:physiology*; D015349:Vision, Monocular / Q000502:physiology; D014796:Visual Perception / Q000502:physiology; D055815:Young Adult