myosis


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myosis

(mī-ō′sĭs)
n.
Variant of miosis.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

myosis

contraction of the pupil of the EYE.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

miosis

Contraction of the pupil or condition in which the pupil is very small (2 mm or less in diameter). It can be brought about by a spasm of the sphincter muscle or by the effect of a miotic drug (e.g. eserine, neostigmine, pilocarpine), or in certain spinal diseases or any stimulation of the parasympathetic supply to the eye. Miosis occurs naturally when doing close work or when stimulated by light. Note: also spelt myosis. See corneal reflex; pupil light reflex; baring of the blind spot; Horner's syndrome.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann
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References in periodicals archive ?
Caption: Figure 1: Myosis and eyelid ptosis were noted on the right side.
Ipsilateral signs of autonomic response may usually be present, such as lacrimation, rhinorrhoea, nasal congestion, forehead and facial perspiration, myosis, ptosis, eyelid edema, conjunctival injection and temporal arterial inflammation.
Upon the arrival at the emergency room, she presented a Glasgow Coma Scale (GCS) of 15, and her symptoms included perspiration, tremors, myosis, respiratory problems, sialorrhea, and vomiting.
Upward gaze is most frequently affected, but ptosis and myosis may also be present.[10]
On systemic and neurologic examination, slow speaking, weak appearance, mild myosis in the pupils, and mild ataxia while walking in a straight line were observed.
In the 1976 article by Clement and Scully, (2) an origin from the endometrial stromal cells, adenomyosis, stromal myosis, endometriosis, or multipotential myometrial cells was postulated for these stromal tumors.
(5) The most common presentation is abdominal distension, pain and neurologic symptoms due to severe nerve root compression and sometimes Horner's syndrome (ptosis, myosis, and ipsilateral anhydrosis).