Direct And Indirect Pupillary Light Reflex. In 46 patients with definite multiple sclerosis ms the direct and indirect pupillary light reflex latency plrl and visual evoked potential vep latency of the p100 were measured for each eye separately. A greater intensity of light causes the pupil to constrict miosis myosis.
The plrl was measured at both photopic and scotopic illuminance level using an infrared lig. The consensual plr pathway direct stimulus of the left eye results in an indirect constriction of the right pupil which is termed the consensual response. Via the direct and indirect pupillary light reflexes.
The pupillary light reflex plr or photopupillary reflex is a reflex that controls the diameter of the pupil in response to the intensity of light that falls on the retinal ganglion cells of the retina in the back of the eye thereby assisting in adaptation of vision to various levels of lightness darkness.
A greater intensity of light causes the pupil to constrict miosis myosis. An rapd is diagnosed by observing paradoxical dilatation when light is directly shone in the affected pupil after being shown in the healthy pupild to be from a pathologic process. When light reaches a pupil there should be a normal direct and consensual response. The consensual plr pathway direct stimulus of the left eye results in an indirect constriction of the right pupil which is termed the consensual response.
