Usually bilateral condition where the pupil is small and constricts briskly when the target is near and is associated with late-stage syphilis. However, it is called ‘pseudo-Argyll Robertson pupil’ when associated with non-syphilis conditions such as diabetic neuropathy, alcohol midbrain degeneration, multiple sclerosis, and stroke. The pupil does not react to bright light, thus displays light-near dissociation.