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 speed at which it occurs) increases with age.[4]
In ophthalmology intensive studies of pupillary response are conducted via videopupillometry.[5]
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 10.1126/science.132.3423.349
- ^ 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, <http://purl.access.gpo.gov/GPO/LPS78702>
- ^ Ishikawa, S.; Naito, M. & Inaba, K. (1970), "A new videopupillography", Ophthalmologica 160 (4): 248-259
Bibliography
See also
|
