Moon Illusion and Emmert's Law

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Science  30 Mar 1962:
Vol. 135, Issue 3509, pp. 1125-1126
DOI: 10.1126/science.135.3509.1125


The perceived size of an afterimage varies with the part of the sky to which it is projected in a manner predictable from Emmert's Law and the appearance of the sky as a flattened dome. This effect is directly analogous to the moon illusion.