| pupillary r. |
1. contraction of the pupil on exposure of the retina to light. Called also light r. 2. any reflex involving the iris, changing the size of the pupil in response to a stimulus, e.g., change in illumination, change in point of fixation, sudden loud noise, or emotional stimulus.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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