Note how the conservative tweed coat favored by academic vision scientists is transformed by undersampling into a more sporty plaid jacket worn by fashion-conscious Ophthalmologists and Optometrists.

The important point is that the tiny little checks in the tweed coat are still detectable in the neural image- clearly this is no uniform blazer - even though the individual checks can't be resolved correctly. This is aliasing, and we believe that the spatial frequency at which aliasing first appears perceptually provides us with an estimate of the sampling density of that neural array which limits spatial resolution in human vision.

With this motivation, then, our aim in the experiments I'd like to tell you about today was to use this psychophysical technique of measuring the onset of aliasing to estimate the sampling limit to visual resolution everywhere in the visual field and to compare the results with the topography of retinal neuroanatomy. However, before I can tell you about the results of those experiments, I need to deal with a small problem.

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