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Unilateral cases, where only one pupil is dilated and fixed, is known as anisocoria, meaning unequal pupil size. The largely dilated pupil may affect one eye (unilateral) or both eyes (bilateral). Schallhorn SC, Kaupp SE, Tanzer DJ, Tidwell J, Laurent J, Bourque LB. Blown pupils are dilated very widely and fixed, meaning they do not respond to an outside stimulus, such as light. Ocular manifestations of drug and alcohol abuse. a patient with a vacant, blank look for 30 seconds following a seizure. Pupillary reactivity as an early indicator of increased intracranial pressure: the introduction of the Neurological Pupil index. - a period of drowsiness following a seizure. doi:10.3892/ol.2017.5648Ĭhen JW, Gombart ZJ, Rogers S, Gardiner SK, Cecil S, Bullock RM. Iris metastasis as the first sign of small cell lung cancer: a case report. March 23, 2016.īrigham And Women's Hospital. This condition causes one of the dog's pupils to be smaller than the other. Anisocoria refers to an unequal pupil size. The pupil expands when there is little light present, and contracts when there is a greater amount of light present. Pupillary disorders including anisocoria.Īmerican Academy of Ophthalmology. Astigmatism means your eye is shaped more like a rugby ball than a football, so light is focused at more than 1 place in the eye. The pupil is the circular opening in the center of the eye that allows light to pass through. What kinds of eye examinations are there? April 20, 2016. Anisocoria and an array of neurologic symptoms in an adult with Ewing sarcoma. Unequal pupils, or anisocoria as it is called in the medical community, occurs when one of a cats pupils (the black openings in the center of the iris) is. Safe and sensible preprocessing and baseline correction of pupil-size data. What is the medical term meaning unequal pupil size Wiki User. Mathôt S, Fabius J, Van Heusden E, Van der Stigchel S. A model of the entrance pupil of the human eye. The words swell and dilate can be used in similar contexts, but swell implies gradual expansion beyond a thing's original or normal limits.Aguirre GK. The synonyms inflate and dilate are sometimes interchangeable, but inflate implies expanding by introduction of air or something insubstantial and suggests a vulnerability to sudden collapse.Īn inflated ego When would swell be a good substitute for dilate? Specifically, distend implies outward extension caused by pressure from within.Ī distended abdomen Where would expand be a reasonable alternative to dilate?Īlthough the words expand and dilate have much in common, expand may apply regardless of the manner of increase (such as growth, unfolding, addition of parts).Ī business that expands every year When is it sensible to use inflate instead of dilate? The words distend and dilate are synonyms, but do differ in nuance. However, amplify implies the extension or enlargement of something inadequate.Īmplify the statement with details When can distend be used instead of dilate?
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In some situations, the words amplify and dilate are roughly equivalent.
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While all these words mean "to increase in size or volume," dilate applies especially to expansion of circumference.ĭilated pupils When is amplify a more appropriate choice than dilate? Some common synonyms of dilate are amplify, distend, expand, inflate, and swell. Frequently Asked Questions About dilate How does the verb dilate differ from other similar words?