oculomotor macropsia
   A term used to denote a magnification (i.e. an apparent increase in size) of a visually perceived object or stimulus that is attributed primarily to accommodation and divergence of the eyes. It is conceptualized as a * physiological illusion that occurs when one views objects farther away than a metre, while the eyes are in their resting focus position, i.e. focused at a distance of about 1 m. Oculomotor macropsia may play a role in the mediation of the *Moon illusion. The term is used in opposition to *oculomotor micropsia.
   References
   Ross, H., Plug, C. (2002). The mystery of the moon illusion. Exploring size perception. Oxford: Oxford University Press.

Dictionary of Hallucinations. . 2010.

Look at other dictionaries:

  • macropsia —    Also known as macropsy, macroptic vision, megalopsia, and megalopia. The term macropsia comes from the Greek words makros (large) and opsis (seeing). It refers to a visual distortion in which objects and stimuli are perceived as… …   Dictionary of Hallucinations

  • moon illusion —    Also known as Moon size illusion and horizon illusion. All three terms refer to the Moon s apparently increased size when it approaches the horizon, in comparison with its perceived size when it is in the zenith. The ratio of this apparent… …   Dictionary of Hallucinations

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