馬 pattern

扇形異瞳

Part of one iris a different color from the rest (sectoral or split heterochromia); also the part-black 'snake eye' of eclipse leopard geckos, where only part of the eye is pigmented, as against the fully black eclipse eye (BLACK).

3 馬 breeds list 扇形異瞳. It is in a club standard for 1 breeds.