I too was wondering if the eyes were a new color, they focused on them pretty thoroughly (not sure if because it's a new color or merely to make it certain he had become a Zombie).
I was surprised no one brought it up on The Talking Dead, so, I figured maybe they weren't a different color afterall, (Or we're supposed to ignore it) maybe they'd always been a goldish color (I think Merle's were goldish, but, not quite that gold)
One Day I hope to be the Man my Cat thinks I am
Where are we going? And why are we in this Handbasket?