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 periodicals archive ?
The lower dose caused minimal pupil dilation (less than 1 mm), which minimized light sensitivity experienced at higher concentrations.
Volunteers were tested for their levels of attraction towards the motorist using telltale signs like their pulse rate, pupil dilation, blink rate and body language.
During the study, the children of 47 mothers with a history of major depressive disorder were shown happy, angry and sad images while researchers tracked their pupil dilation.
EIDON can be used automatically or manually, with or without pupil dilation.
i-Optics developed the EasyScan to make medical grade images of the retina within three minutes and without any need of pupil dilation.
For that, the urine and pupil dilation tests have been introduced.
We are acutely aware of just how important phenylephrine's unique mechanism of action is in providing maximum pupil dilation, which is of paramount importance in protecting the public health through early detection, diagnosis and treatment of serious eye diseases.
The product, which is built around a free mobile app, lets a smartphone camera measure facial movement including pupil dilation and heat and light on the face to determine a user's identity.
The computer during the interrogation can pick up the physical signs of deceit, and someone being uncomfortable or upset through various means such as pupil dilation.
If a hit registers in the yellow or red range, the district athletic trainer will call the player out of the game and check for concussion symptoms, such as headaches, dizziness, confusion, and pupil dilation.
According to the patent, the user's pupil dilation will be tracked with the data fed directly back to Google's server.