Miosis, mydriasis, anisocoria, and Horner syndrome

Degrees of miosis [constricted pupil], mydriasis [dilated pupil] and anisocoria [asymmetric pupil size] occur in many ocular diseases with or without degrees of blindness. Although our patients are not very frequently presented because of these problems alone, identifying the site(s) of neural damage helps greatly in localizing the lesion and consolidating a diagnosis and prognosis. Horner syndrome and the intricate sympathetic supply to the eye and head is emphasised.