Compelling evidence that resolution is not limited because of contrast insufficiency is the fact that resolution acuity grows with contrast initially, but then saturates. In other words, further increases of contrast yield no further increases in resolution, which implies that peripheral resolution is limited by not by the contrast attenuating effects of spatial filters, but by some other mechanism which we assert is neural undersampling. Although these data do not prove resolution is sampling-limited, they do reject the alternative model that resolution is contrast-limited.

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