light reflex


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light reflex

[′līt ‚rē‚fleks]
(physiology)
The postural orientation response of certain aquatic forms stimulated by the source of light; receptors may be on the ventral or dorsal surface.
The response in which the pupil dilates when light levels are lowered, and constricts when light levels are raised.
References in periodicals archive ?
As the parameters of the light reflex may reflect both the intensity of the light stimulus and the age of the subject, two-factor analyses of variance (ANOVA) were also performed (age group x light intensity as a within-subject factor).
Pupillary light reflex was positive prognostic indicator and three of the four dogs which had positive pupillary regained vision which is in agreement with earlier findings (Miller, 2001).
The light response test is important as it examines the integrity of the pupillary light reflex pathway.
He also had anisocoria (the right pupil was larger than the left), pupillary light reflex was absent in both eyes, and his right eye deviated laterally.
Ears: TMs dark red, mobile, landmarks visible, light reflex present.
Direct pupillary light reflex, menace response and dazzle reflexes were present.
0 mm, both direct and indirect light reflex of the bilateral pupils disappeared.
Light-reflex test: This assesses the integrity of the pupillary light reflex pathway.
Pupil diameter was measured with a pupillary gauge, and pupillary light reflex was assessed by using a standard light source from time zero (Tbase) to 250 minutes after application (T250).
Menace reflex, corneal reflex, pupillary light reflex were absent, but palpebral reflex was present in affected eye in both cases.