Neurologic Exam-Adult | Cranial Nerve Exam | Abnormal | Vergence

Cranial Nerve Exam - Abnormal 14 - Vergence: Light-near dissociation occurs when the pupils don't react to light but constrict with convergence as part of the near reflex. This is what happens in the Argyll-Robertson pupil (usually seen with neurosyphilis) where there is a pretectal lesion affecting the retinomesencephalic afferents controlling the light reflex but sparing the occipitomesencephalic pathways for the near reflex.