mydriatic

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mydriatic

 [mid″re-at´ik]
1. dilating the pupil.
2. a drug that dilates the pupil.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

myd·ri·at·ic

(mid'rē-at'ik),
1. Causing mydriasis or dilation of the pupil.
2. An agent that dilates the pupil.
Farlex Partner Medical Dictionary © Farlex 2012

mydriatic

(mĭd′rē-ăt′ĭk)
adj.
Causing dilatation of the pupils.
n.
A mydriatic drug.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

myd·ri·at·ic

(mid'rē-at'ik)
1. Causing mydriasis or dilation of the pupil.
2. An agent that dilates the pupil.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

mydriatic

1. Causing mydriasis of the pupil. 2. A drug which produces mydriasis. Mydriatics are used to carry out a thorough inspection of the fundus and lens, especially in elderly patients in whom the pupils are usually smaller. However, in older people it must be ascertained that the patient does not have glaucoma. There are two classes of mydriatics: (1) antimuscarinic (parasympatholytic, anticholinergic, atropine-like) drugs which antagonize the action of acetylcholine at muscarinic receptors in the ciliary muscle, such as atropine, cyclopentolate, homatropine, hyoscine (scopolamine) and tropicamide. Antimuscarinic drugs produce cycloplegia as well. (2) sympathomimetic (adrenergic stimulating) drugs which directly or indirectly stimulate the dilator pupillae muscle which is innervated by the sympathetic division of the autonomic nervous system. These include cocaine, ephedrine hydrochloride, adrenaline (epinephrine), naphazoline and phenylephrine hydrochloride. See adrenergic receptors; cholinergic; cycloplegia; miotics; dilator pupillae muscle; mydriasis; pupil light reflex; sympathomimetic.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann

myd·ri·at·ic

(mid'rē-at'ik)
1. Causing mydriasis or dilation of the pupil.
2. An agent that dilates the pupil.
Medical Dictionary for the Dental Professions © Farlex 2012