Everything You Need To Know About Heterochromia: Types, Causes & Rarity

A Condition Similar To Heterochromia

A condition that on the surface appears similar to heterochromia is called anisocoria, which is the condition of having unequal pupil sizes that make the irides of each eye appear in different colors. The eye with the larger sized pupil tends to appear darker than the other eye although the irides are the same in color. Mild anisocoria is a relatively common condition affecting about twenty percent of the population, but significant anisocoria (one pupil is larger by more than one millimeter) may be the result of eye trauma, certain eye medications, inflammation of the iris, Adie’s syndrome, and some neurological disorders. The late David Bowie was initially thought to have heterochromia, but he had revealed that a fistfight as a teenager left him with anisocoria as one of his pupils remained permanently dilated.