Direct And Indirect Light Reflex Pathway. Either no or sluggish response to light both direct and. The fibers enter the orbit with cniii nerve fibers and ultimately synapse at the cilliary ganglion.
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Observe the direct response constriction of the illuminated pupil. The plrl was measured at both photopic and scotopic illuminance level using an infrared light reflection technique iris. 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.
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.
The fibers enter the orbit with cniii nerve fibers and ultimately synapse at the cilliary ganglion. 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. Pre ganglionic parasympathetic fibres enter the oculomotor nerve leave the branch to the inferior oblique and synapse in the ciliary ganglion. Light entering the eye is processed through the pupillary light reflex and signals directed to the iris sphincter muscle to adjust the amount of light that reaches the retina.
