It's called heterochromia.

Heterochromia. One blue eye, one brown.

Oh, look, you have heterochromia, too.

Just take a look. - Heterochromia Iridum. - What's that?

But no doctor with heterochromia of the eye is currently employed by the Chartwell hospital.

Heterochromia, is reference to your eyes, which I have to say are stunning.

Amy. Heterochromia was in reference to your eyes, which I have to say are stunning.