The relative contributions of pre-neural and neural factors to areal summation in the fovea

In order to determine the relative contributions of pre-neural and neural factors to areal summation in the fovea, measurements of Ricco's area were made. These were compared to the results of an ideal-observer analysis which incorporated only pre-neural factors, up to the level of the photoreceptor. The comparison indicated that Ricco's area in the fovea is largely (if not completely) accounted for by pre-neural factors. Thus, our results, in agreement with the recent analysis of contrast sensitivity by Banks, Geisler and Bennett (1987; Vision Research, 27, 1915-1924), are consistent with the hypothesis that a neural pathway exists which consists of units whose center mechanisms sum over only a single cone or a single row of cones. Our results also imply that the quantum efficiency for detection is constant for test areas up to 256 min2, once the effects of the optics and receptor aperture are factored out.

[1]  J. M. Foley,et al.  Contrast detection and near-threshold discrimination in human vision , 1981, Vision Research.

[2]  K Kani,et al.  Retinal sensitivity and spatial summation in the foveal and parafoveal regions. , 1981, Journal of the Optical Society of America.

[3]  Ivar Lie,et al.  Visual detection and resolution as a function of adaptation and glare , 1981, Vision Research.

[4]  A. Rose,et al.  The Relative Sensitivities of Television Pickup Tubes, Photographic Film, and the Human Eye , 1942, Proceedings of the IRE.

[5]  R. Hess,et al.  The functional area for summation to threshold for sinusoidal gratings , 1978, Vision Research.

[6]  P. Gouras,et al.  Functional properties of ganglion cells of the rhesus monkey retina. , 1975, The Journal of physiology.

[7]  W S Geisler,et al.  Physical limits of acuity and hyperacuity. , 1984, Journal of the Optical Society of America. A, Optics and image science.

[8]  F M de Monasterio,et al.  Center and surround mechanisms of opponent-color X and Y ganglion cells of retina of macaques. , 1978, Journal of neurophysiology.

[9]  C. H. Graham,et al.  The relation of size of stimulus and intensity in the human eye: I. Intensity thresholds for white light , 1939 .

[10]  D. Williams,et al.  Visibility of interference fringes near the resolution limit. , 1985, Journal of the Optical Society of America. A, Optics and image science.

[11]  W. Geisler,et al.  Ideal discriminators in spatial vision: two-point stimuli. , 1985, Journal of the Optical Society of America. A, Optics and image science.

[12]  W. Richards.  Apparent modifiability of receptive fields during accommodation and convergence and a model for size constancy , 1967 .

[13]  D. H. Kelly.  Visual Contrast Sensitivity , 1977 .

[14]  Wilson S. Geisler,et al.  The physical limits of grating visibility , 1987, Vision Research.

[15]  M. A. Bouman,et al.  Perimetry of contrast detection thresholds of moving spatial sine wave patterns. III. The target extent as a sensitivity controlling parameter. , 1978, Journal of the Optical Society of America.

[16]  W. W. Peterson,et al.  The theory of signal detectability , 1954, Trans. IRE Prof. Group Inf. Theory.

[17]  W. Geisler.  Sequential ideal-observer analysis of visual discriminations. , 1989 .

[18]  M E Wilson,et al.  Invariant features of spatial summation with changing locus in the visual field , 1970, The Journal of physiology.

[19]  S. Hecht,et al.  Size, Shape, and Contrast in Detection of Targets by Daylight Vision. I. Data and Analytical Description1 , 1947 .

[20]  M. A. Bouman,et al.  Spatial Modulation Transfer in the Human Eye , 1967 .

[21]  W. H. Miller,et al.  Photoreceptor diameter and spacing for highest resolving power. , 1977, Journal of the Optical Society of America.

[22]  D. G. Green,et al.  Optical and retinal factors affecting visual resolution. , 1965, The Journal of physiology.

[23]  P. Lennie,et al.  Spatial and temporal contrast sensitivities of neurones in lateral geniculate nucleus of macaque. , 1984, The Journal of physiology.

[24]  Azriel Rosenfeld,et al.  Digital Picture Processing , 1976 .

[25]  H. Vries.  The quantum character of light and its bearing upon threshold of vision, the differential sensitivity and visual acuity of the eye , 1943 .

[26]  Gary D. Bernard,et al.  Averaging over the foveal receptor aperture curtails aliasing , 1983, Vision Research.

[27]  Oscar Estévez Uscanga,et al.  On the fundamental data-base of normal and dichromatic color vision , 1979 .

[28]  H. Levitt.  Transformed up-down methods in psychoacoustics. , 1971, The Journal of the Acoustical Society of America.

[29]  V. Glezer.  The receptive fields of the retina. , 1965, Vision research.

[30]  R. Shapley,et al.  X and Y cells in the lateral geniculate nucleus of macaque monkeys. , 1982, The Journal of physiology.

[31]  D. M. Green,et al.  Signal detection theory and psychophysics , 1966 .

[32]  F. Campbell,et al.  Optical quality of the human eye , 1966, The Journal of physiology.

[33]  S. Hecht,et al.  Size, shape, and contrast in detection of targets by daylight vision; frequency of seeing and the quantum theory of cone vision. , 1948, Journal of the Optical Society of America.

[34]  William H. Miller,et al.  Ocular Optical Filtering , 1979 .

[35]  F. M. D. Monasterio.  Center and surround mechanisms of opponent-color X and Y ganglion cells of retina of macaques. , 1978 .

[36]  B. Boycott,et al.  Organization of the Primate Retina: Light Microscopy , 1969 .

[37]  A. van Meeteren,et al.  Calculations on the Optical Modulation Transfer Function of the Human Eye for White Light , 1974 .