<prompt> A patient presented with complaints of diplopia. OE pupils were dilated. Both direct and consensual light reflexes were lost. The diagnosis is :2nd nerve palsy3rd nerve palsy5th nerve palsy7th nerve palsy  <response>: 3rd nerve palsy PUPILLARY LIGHT REFLEX :- If light enters an eye, the pupil of the same eye contracts direct light reflex,activity shared equally by the pupil of other eye consensual light reflex - Afferent limb of light reflex is Optic nerve CN2 and efferent limb is Oculomotor nerve CN3 - Both direct and consensual light reflexes are lost in third nerve palsy. 