entomopia

entomopia:    Also known as insect vision. The term entomopia comes from the Greek words entomos (insect) and ops (eye). It was coined in or shortly before 1993 by the American neurologists Jaime R. Lopez, Bruce T. Adornato, and William F. Hoyt to denote rows and columns of multiple visual images, assembled of multiple reduplications of a single object or stimulus. The resulting coexistence of similar images within the field of vision is called " multiplication. Entomopia is classified by Lopez et al. as a type of "polyopia. Polyopia is generally classified as a type of "palinopsia, which in turn constitutes a type of " metamorphopsia. In the case described by Lopez et al., the affected individual perceived 100-200 reduplicated images at a time, obscuring his entire field of vision, and making it difficult for him to remain standing. Such episodes of entomopia lasted no longer than 2 min. The etiology and pathophysiology of entomopia are not fully understood. Central variants of polyopia are associated etiologically with a variety of conditions affecting the occipital or occipito-parietal lobe, including encephalitis, trauma, migraine, and the use of "hallucinogens such as mescaline or LSD. It is not inconceivable that similar conditions may be involved in the mediation of entomopia.

   References

   Lopez, J.R., Adornato, B.T., Hoyt, W.F. (1993). 'Entomopia': A remarkable case of cerebral polyopia. Neurology, 43, 2145-2146.

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polyopia — Also known as polyopsia. Both terms stem from the Greek words polus (much, many) and opsis (seeing). They refer to the perception of an image that repeats itself within the visual field. The ensuing coexistence of various similar images within … Dictionary of Hallucinations
insect vision — see entomopia … Dictionary of Hallucinations
metamorphopsia — The term metamorphopsia comes from the Greek words metamorphoun (to change the form) and opsis (seeing). It translates roughly as seeing an altered form . It is not clear who introduced the term, but it appears in a medical lexicon as early as … Dictionary of Hallucinations
multiplication — The term multiplication comes from the Latin verb multiplicare, which means to multiply or to duplicate. It is used to denote the presence of multiple identical images in * visual hallucinations. Multiplication is a characteristic feature of a … Dictionary of Hallucinations
reduplicative phenomenon — The term reduplicative phenomenon is indebted to the Latin noun reduplicare, which means to double. It is used as an umbrella term for a group of illusory perceptual phenomena characterized by the perseveration, reduplication, or reoccurrence… … Dictionary of Hallucinations

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