<unk>  is extremely rare, and other conditions are frequently mistaken for it.<unk>  is often congenital, however not diagnosed until adulthood. The general cause of<unk>  is unknown, but there are some other eye conditions that are in association with<unk> . These include (although not often) polar cataracts, glaucoma, abnormally long eyelashes, abnormal eye development, and poor vision. There have been cases diagnosed from age 3 to adulthood. The prevalence of true<unk>  is minimal. The two kinds of<unk>  are true<unk>  and false pseudopolycoria. There are no known or proposed trends in the occurrences of<unk>  based on geographical location, age, gender, or season.
Polycoria
Heterophoria
Orthophoria
Esophoria
Exophoria
Binocular dysphoria
Astigmatism
Astigmatism 