The normal, most common, sort of heterochromia in cats is when they have odd-eyes. One eye is blue and the other is yellow normally. But there are various types of heterochromia and the one we see on this page is called sectoral heterochromia because each eye is divided up into two colours i.e. there are two sections to the eyes. Turkish Angoras sometimes have odd-eyes and they are favoured. They are often all-white cats too. The classic real Turkish Angora is all-white with odd-eye colour.
The cat below looks a bit like an Angora but is not to the best of my knowledge.
Sectoral heterochromia in an all-white cat. Photo: Reddit.com. |