I think that it is critical you have Miley's eye checked by your vet to rule out anything serious. If the spot is OK, at least your vet will have a baseline exam of the spot to compare during later checkups.
So I hope it will be all right with everyone if I bring it here and urge everyone, please, take your kitty to an ophtalmologist if you see anything, even just one spot in your kitty's eye.