Aww noo
could it be just like a lazy eye thing? My hams sometimes had it but it would open again by itself. Does it look swollen? Or sore? Could the red just be from were the furs wet and skin showing through? Prob just water to be safe, I'd keep a close eye on it lol (sorry) and if it doesnt get any better next few days then pop to vets. thats what Id do anyway.
Hopefully its nothing serious xx