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Pupillary response or dilation of the pupil is a physiological response that varies the size of the pupil of the eye via the iris dilator muscle. It can have a variety of causes. It may be an involuntary reflex reaction to exposure to light. Or it may indicate interest in the subject of attention or indicate sexual stimulation.1 The pupils contract immediately before someone falls asleep.2
A pupillary response can be intentionally conditioned as a Pavlovian response to some stimulus.3
The latency of pupillary response (the time in which it takes to occur) increases with age.4
In ophthalmology, intensive studies of pupillary response are conducted via videopupillometry.5
See also
- Dilated fundus examination
- Iris dilator muscle
- Iris sphincter muscle
- Mydriasis
- Miosis
- Pupillary light reflex
- Pupilometer
References
- ^ Hess, Eckhard H.; Polt, James M. (5 August 1960), "Pupil Size as Related to Interest Value of Visual Stimuli", Science 132 (3423): 349, doi:, PMID 14401489
- ^ Lowenstein, Otto; Feinberg, Richard; Loewenfeld, Irene E. (April 1963), "Pupillary Movements During Acute and Chronic Fatigue: A New Test for the Objective Evaluation of Tiredness", Investigative Ophthalmology (St. Louis: C.V. Mosby Company) 2 (2): 138–157, http://purl.access.gpo.gov/GPO/LPS75010
- ^ Baker, Lynn Erland (1938). "The Pupillary Response Conditioned to Subliminal Auditory Stimuli". Ohio State University.
- ^ Podolak, Edward; Feinberg, Richard (September 1965), Latency of pupillary reflex to light stimulation and its relationship to aging, Federal Aviation Agency, Office of Aviation Medicine, Georgetown Clinical Research Institute, pp. 12, OCLC 84657376, http://purl.access.gpo.gov/GPO/LPS78702
- ^ Ishikawa, S.; Naito, M.; Inaba, K. (1970), "A new videopupillography", Ophthalmologica 160 (4): 248–259
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- This page was last modified on 17 November 2008, at 19:01.
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