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Medical Definition of Phi phenomenon
1. An illusion of movement, which occurs by means of successive visual impressions at intervals of 1/15 to 1/20 sec; when an occluder is passed from one eye to the other while a small distant light is observed, the light seems to move with the occluder in exophoria, but in an opposite direction in oesophoria. (05 Mar 2000)
Lexicographical Neighbors of Phi Phenomenon
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