pupillary reflex

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Related to Pupil constriction: Pupil dilation
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Noun1.pupillary reflex - reflex contraction of the sphincter muscle of the iris in response to a bright light (or certain drugs) causing the pupil to become smallerpupillary reflex - reflex contraction of the sphincter muscle of the iris in response to a bright light (or certain drugs) causing the pupil to become smaller
References in periodicals archive ?
Although the preliminary work had not yet confirmed that PLRT delay was the result of sows' psychological depression, a large number of human studies had shown that the latency time of the pupil constriction onset of depressive patients was significantly longer than that of normal subjects [11].
Intraoperative floppy-iris syndrome (IFIS) associated with the usage of tamsulosin (Flomax[R]), first described by Chang and Campbell (1) in 2005, is defined by iris billowing, prolapse, and progressive pupil constriction during cataract surgery.
Despite having damaged afferent neurons, the efferent pathway is still intact allowing pupil constriction in both eyes.
With low flash intensity to minimize pupil constriction, the time required for taking multiple pictures is shortened.
A pupil constriction test showed that, of the 12 mice that received the cell transplant, 10 showed improved pupil constriction in response to light.