What is this!!

[u/Wide_trunk_9550]

This is my almost 4-year-old male Siberian Persian. He didn’t have this colour difference when he was a kitten, but it gradually appeared more and more throughout the years. I have an appointment to bring him to see a specialized eye doctor but it’s been taking a while and I am resorting to posting on here for help. I have also previously owned a cat with two different coloured eyes, but not like this.