Abstract
In discussing possible mechanisms of the apprehension of either brightness gradients or contours in the retina, the late Kenneth J. W. Craik (in press) proposed a process of differentiation of the output of the bacillary layer in the several subjacent strata of the bipolar layer, such that each cell would compute the difference of the output between two adjacent pairs of rods or cones as shown in Figure 1, and the neurons of subjacent layers the output of neurons above them.
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Literature
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Sherwood, S.L. A theoretical consideration of perception at lower levels. Bulletin of Mathematical Biophysics 27, 281–283 (1965). https://doi.org/10.1007/BF02478405
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DOI: https://doi.org/10.1007/BF02478405