The spatial grain of the perifoveal visual field.
作者： Gerald Westheimer
DOI: 10.1016/0042-6989(82)90177-8
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摘要: Abstract Measurements for normal human photopic vision in the fovea and 2.5, 5 10° positions periphery reveal that hyperacuity thresholds rise faster with eccentricity than visual resolution thresholds. On other hand, retinal distances over which detection remains optimal show a much slower rise. At eccentricity, are 10 times higher, 4–5 processing only 2–3 larger at fovea. Psychophysical procedures do not, therefore, provide single unambiguous measure changes of spatial grain across field.
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