Pupil is an important ocular structure it is known as a window of eye through which we can look in to posterior segment of eye. Post segment of eye particularly are optic nerve and retina pupil is central round regular and reacting however we can have lots of papillary abnormalities. Congenital Axenfeld syndrome where one has: Polycoria traumatic miosis Mydriasis Anteflexion Retroflexion Pontine hemorrhage opium of iridodialysis, cyclodialysis, aniridia, congenital coloboma and Cannabis indica with ill sustained pupil have a pin point in iris. The drug mydriatics is a retrobulbar neuritis drugs that can cause dilated and miotics can cause small pupils respectively.

One can have Argyll Robertson pupil and eosinophils RAPD (Relative Afferent Pupillary Defect). Irregular pupil in iridocyclitis affect pupillary membrane and many more conditions affecting the pupil. Share your opinions.