Visual Reaction Times on a Circle about the Fovea

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Science  27 Jan 1967:
Vol. 155, Issue 3761, pp. 481-482
DOI: 10.1126/science.155.3761.481


Reaction times to a dim photopic stimulus were measured on a circle about the fovea, 15° from the line of direct vision. Large variations in reaction time were found on various half meridians and were interpreted as reflecting the distribution of retinal receptors.