light reflex

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  • noun

Synonyms for light 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 ?
9) In our case, when the patient was referred to us almost two weeks after the electrical injury, the mild pallor appearance of the right optic disk and decreased direct light reflex were marked.
Testing for a red reflex with the direct ophthalmoscope entails looking through the ophthalmoscope at a distance from the child and observing the red light reflex emitted from the pupil (Figs 6-9).
Other neurologic examinations showed limitation of extraocular movement in all directions, normal pupil size and light reflex, and facial diplegia.
Pupils were mid-dilated with absent direct and consensual light reflex.
Thirty-eight pigeons received either a lesion of the nucleus of Edinger-Westphal (EW) that impaired parasympathetic ChBF control and the pupil light reflex (PLR), or a lesion of area pretectalis (AP) that only impaired the PLR/ Birds were then housed in either cyclic (12 h light/12 h dark) or constant light.
the distance from the upper eyelid margin to corneal light reflex in primary gaze (MRD1) (normal: 4 to 5 mm);
The amplitude of light reflex is defined as the ratio of the change in pupil size to the initial pupil size.
The percentage of copepods in the field of view (~15 individuals) undergoing a dorsal light reflex (frontal axis perpendicular to the stimulus light [+ or -] 30[degrees]) was analyzed.
A new study showed that NeurOptics Pupillometers reliably measure the presence and quality of the pupillary light reflex after cardiac arrest and during resuscitation, producing readings that correlate with survival and neurological outcomes.
Positive prognostic indicators include brachycephalic confirmation, minimal globe displacement and presence of pupillary light reflex (Gilger et al.
Pupillary light reflex (PLR) and pupillary diameter were recorded in a darkened room at the following time points: 0, 10, 20, 30, 40, 50, 60, 80, 100, 120, 140, 160, 180, 200, 220, 240, 300, and 360 minutes, and 24 hours.
Conversely, when light is shone into the normal eye both the direct and consensual responses are present as there is no damage to the afferent light reflex pathway for the normal eye.
It was impossible to have cooperation with the patient due to the mixed aphasia and her pupils were anisocoric (right > left), and pupillary light reflex can be taken.