The moon illusion revisited.

J H Iavecchia; H P Iavecchia; S N Roscoe

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PubMed · 6830556

The moon illusion revisited.

J H Iavecchia·H P Iavecchia·S N Roscoe

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Abstract

In two experiments, the apparent size of a simulated horizon moon was measured as a function of the location of visible texture in the natural vistas against which it appeared. Size was found to increase as the visible scene extended farther into the distance and to decrease as the moon rose above the vista of surface texture. In the second experiment, the observers' eye accommodation distances to various scenes were also measured with a laser optometer, and after appropriate transformations, size judgments were found to correlate 0.89 with measured accommodation values, thereby suggesting the hypothesis that the fabled moon illusion is mediated by the oculomotor adjustments of visual accommodation.

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Accommodation, Ocular Astronomical Phenomena Astronomy Distance Perception Humans Illusions Optical Illusions Size Perception Vision, Ocular Visual Perception Journal Article

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J H Iavecchia, H P Iavecchia, S N Roscoe. 1983. The moon illusion revisited.. https://pubmed.ncbi.nlm.nih.gov/6830556/

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