In this filtering theory of visual resolution, the neural sampling elements have receptive fields which are relatively large compared to their spacing, which causes them to overlap extensively, with the net result that none of the neurons in the array are able to respond significantly to spatial frequency components of the retinal image which lie beyond the Nyquist frequency of the array.

So, if this filtering model is correct, then we need to put the blame on too much filtering leading to contrast insufficiency, not neural undersampling, as the fundamental mechanism which limits our visual resolution.

The neural undersampling model is quite different, as shown in the next slide.

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WWWaveTM 1996
World Wide Web automated virtual environment TM 1996
Kevin Haggerty, Indiana University.