mydriasis

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mydriasis

[mə′drī·ə·səs]
(medicine)
Prolonged dilation of the pupil of the eye.
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More recently, Savin-Williams and human development postdoctoral associate Gerulf Rieger discovered that pupil dilation is an accurate indicator of one's sexual attraction--the first scientific evidence of this phenomenon.
By examining fixations, saccades, pupil dilation, blinks and a variety of other behaviours, researchers can determine the effectiveness of a given medium or product.
The measures included skin conductance, blood volume pulse, brainwave patterns (using electroencephalograms), muscle activity (using electromyography), breathing activity, and pupil dilation.
Abstract: The avian iris is mainly composed of striated muscle fibers, and the topical parasympatholytic drugs used in mammals to induce pupil dilation are ineffective in birds.
The panel found that Mr Foo did not utilise pupil dilation and indirect ophthalmoscopy as he ought to have done.
User Vision's technology can also help interpret reactions to websites and ads; pupil dilation and blink rate can show the depth of emotion content evokes.
The participants were hooked up to eye-tracking equipment to measure their pupil dilation and eye motion.
And the system links these to emotions and physiological processes such as blood flow, eye movement patterns and pupil dilation.
And studies suggest that pupil dilation as measured using a commercially available hand-held pupillometer might provide a good peripheral physiologic correlate of activity going on in the brain structures of therapeutic interest, said Dr.
Tasks include balance and co-ordination tests, counting tests and a pupil dilation test.
The authors note that depending on the drug being aerosolized, entry into the eyes may result in pupil dilation and glaucoma.
He is able to detect subtle changes such as skin-tone tightening or pupil dilation, warning his owner with a fixed stare up to 10 minutes before she has a fit.