Complete heterochromia happens when each eye is one distinct color.
当每只眼睛都是一种不同的颜色时,就是完全异色症。
十万个为什么
Central heterochromia, on the other hand, is when your eyes have multiple colors mixed across the two.
另一方面,中央异色症是当你的两只眼睛有多种颜色混合的情况。
英语百科
Heterochromia iridum
In anatomy, heterochromia (ancient Greek: ἕτερος, héteros, different + χρώμα, chróma, color) is a difference in coloration, usually of the iris but also of hair or skin. Heterochromia is a result of the relative excess or lack of melanin (a pigment). It may be inherited, or caused by genetic mosaicism, chimerism, disease, or injury.