Heterochromia of the eye ( heterochromia iridis or heterochromia iridum ; the common incorrect form `` heterochromia iridium '' is not correct Latin ) is of two kinds .
The terms Hetrochromia iridis ( = different color of the iris ) , Heterochromia iridum ( plural form ) and Heterochromia iridium ( a mistake in Latin grammar ) are variously used when it is the eye color which is specifically mentioned .