Hippus, also known as pupillary athetosis, is spasmodic, rhythmic, but irregular dilating and contracting pupillary movements between the sphincter and dilator muscles. Pupillary hippus comes from the Greek hippos meaning horse, perhaps due to the rhythm of the contractions representing a galloping horse. It is particularly noticeable when pupil f...
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http://en.wikipedia.org/wiki/Hippus
(from the article `eye, human`) ...to five millimetres (about 0.18 inch). During this steady condition, the pupils do not remain at exactly constant size; there is a characteristic ...
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http://www.britannica.com/eb/a-z/h/52
Intermittent pupillary dilation and constriction, independent of illumination, convergence, or psychic stimuli. ... Origin: G. Hippos, horse, from a fancied suggestion of galloping movements ... Respiratory hippus, dilation of the pupils occurring during forced, voluntary inspiration, and contraction during expiration. ... (05 Mar 2000) ...
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http://www.encyclo.co.uk/local/20973
(hip´әs) abnormal exaggeration of the rhythmic contraction and dilation of the pupil, independent of changes in illumination or in fixation of the eyes.
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http://www.encyclo.co.uk/local/21001
Type: Term Pronunciation: hip′ŭs Definitions: 1. Intermittent pupillary dilation and constriction, independent of illumination, convergence, or psychic stimuli.
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http://www.medilexicon.com/medicaldictionary.php?t=41058
spasmodic contraction of the pupil of the eye.
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https://www.infoplease.com/dictionary/hippus
No exact match found.
