To explain why this is needed. AI can already do heterochromia, but it can't tell left and right aside. Because of how perspectives work, observer's left is a character's right. I experimented a lot with trying to give a character heterochromia, but color placement was pretty much random. Even using the same prompt gives different results. Sometimes you can just mirror the image to flip eyes around, but that only works on symmetrical characters.

This model is trained on characters with heterochromia and character's right eye being purple (left for observer). It removes that uncertainty.

Because of the separation into civitai red (which won't load for me) and everything being broken for a while, took me a while to finally be able to train this model.

Purple and Blue: purple_right_eye_heterochromia, heterochromia with purple right eye and blue left eye, purple eye (right eye), blue eye (left eye)

Purple and Green: purple_right_eye_heterochromia, heterochromia with purple right eye and green left eye, purple eye (right eye), green eye (left eye)

Purple and Red: purple_right_eye_heterochromia, heterochromia with purple right eye and red left eye, purple eye (right eye), red eye (left eye)