Double pupil in Toulouse goose

[1goose2ducks]

i just noticed that my male Toulouse goose seems to have a double pupil. He has a normal black pupil and then a very dark brown spot overlapping it. Can it be a tumor I hope not. Please help! I will try to get a pic later.

 

[1goose2ducks]

 

[1goose2ducks]

I am not sure if you can see it but his pupil looks like a cartoon lightbulb