mydriasis

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my·dri·a·sis

 (mĭ-drī′ə-sĭs)
n.
Dilation of the pupil of the eye, especially when excessive or prolonged, usually as a result of trauma, a medical disorder, or a drug.

[Latin mydriāsis, from Greek mudriāsis, perhaps from mudros, red-hot mass of metal in a forge (in reference to the more brilliant appearance of the dilated pupil to ancient physicians, as a result of light reflected off the fundus of the eye ); possibly akin to mudān, to be damp, dripping ( mudros perhaps originally referring to molten iron).]

mydriasis

(mɪˈdraɪəsɪs; maɪ-)
n
(Pathology) abnormal dilation of the pupil of the eye, produced by drugs, coma, etc
[C17: via Late Latin from Greek; origin obscure]

my•dri•a•sis

(mɪˈdraɪ ə sɪs, maɪ-)

n.
excessive dilatation of the pupil of the eye, as the result of disease, drugs, or the like. Compare miosis.
[1650–60; < Latin mydriāsis < Greek mydríāsis, appar. derivative of mýdros hot mass of iron, though sense connection unclear]

mydriasis

abnormal dilatation of the pupil, the result of disease or the use of certain drugs. Cf. miosis. — mydriatic, adj.
See also: Eyes
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.mydriasis - reflex pupillary dilation as a muscle pulls the iris outward; occurs in response to a decrease in light or certain drugs
dilatation, dilation - the act of expanding an aperture; "the dilation of the pupil of the eye"
Translations

my·dri·a·sis

n. midriasis, dilatación prolongada de la pupila.
References in classic literature ?
Although the young man was brave, as we know, he was terrified at that wild countenance, those terribly dilated pupils, those pale cheeks, and those bleeding lips.
His dilated pupils swerved from my face, glan cing at the window with a sort of scared fury.
On each of these occasions Mrs Verloc's dilated pupils, losing their far-off fixity, followed her husband's movements with the effect of black care and, impenetrable attention.
Her eyes raised for a moment seemed full of innocent suffering and unexpressed menace in the depths of the dilated pupils within the rings of sombre blue.
Profiler plus, the first instrument based on innovative wavefront technology that precisely and objectively measures the vision profile of each patient including highly dilated pupils to simulate night and twilight conditions.
Treatment made no difference, and repeated examinations showed that she was unable to make any spontaneous movement, did not respond to any stimuli, and had fixed and dilated pupils.
After our first meeting I noticed that her myopically dilated pupils inside fine light blue rims, hidden (like mine) behind the lenses of a pince-nez, were affectionately, but relentlessly following me.
Physical signs include dilated pupils, excessive talking and slurred speech.
Other physical symptoms of impairment include deterioration of personal appearance, smell of alcohol on breath or perspiration, red faced, blood shot eyes, glassy eyes, pinpoint or dilated pupils, sweating, slow slurred speech, sleeping on the job, mood swings, poor impulse control, memory lapses and blackouts.
Normally, an ipsilateral fixed and dilated pupil suggests lateral transtentorial herniation, while bilaterally fixed and dilated pupils are consistent with central transtentorial herniation in a fully resuscitated patient.
Animals that ingest even tiny quantities (two bites of a tuber have killed humans) show salivation, dilated pupils, respiratory distress and convulsions.
You can protect yourself by having regular eye exams through dilated pupils.