light reflex


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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 ?
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.
the distance from the upper eyelid margin to corneal light reflex in primary gaze (MRD1) (normal: 4 to 5 mm);
Other neurologic examinations showed limitation of extraocular movement in all directions, normal pupil size and light reflex, and facial diplegia.
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).
Thomas Hanna, in his book Somatics, (1) described this phenomenon as the red light reflex, presenting a list of possible responses.
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.