Transmission of spatial information in S-cone pathways.
The mosaics of S-cones and the neurons to which they are connected are relatively well characterized, so the S-cone system is a good vehicle for exploring how the sampling of the retinal image controls visual performance. We used an interferometer to measure the grating acuity of the S-cone system in the fovea and at a range of eccentricities out to 20 deg. We also developed a simple model observer that, by assuming only that cone pathways are noisy and that signals are subject to eccentricity-dependent postreceptoral pooling, predicts the measured acuities from the sampling properties of the S-cone mosaic. The amount of pooling required to explain performance is consistent with that suggested by anatomical and physiological measurements.
Metha
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AB
Center for Visual Science, University of Rochester, New York, USA.
Lennie
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P
D006801:Humans; D007368:Interferometry; D008027:Light; D008297:Male; D012160:Retina / Q000502:physiology; D017949:Retinal Cone Photoreceptor Cells / Q000502:physiology*; D013028:Space Perception / Q000502:physiology*; D014792:Visual Acuity / Q000502:physiology*; D014795:Visual Pathways / Q000502:physiology*