Ulcers affect the cornea, the glistening and transparent membrane that makes up the feline eyeball's surface, making it appear cloudy or milky and red.
These upper respiratory diseases are highly contagious among cats, so you might find both your cats’ eyes turn red; they might squint or wink repeatedly.
Eosinophilic Keratitis can make your cat’s eyes appear pink, white, or grey. This chronic inflammatory disease happens when a type of white blood cell invades the cornea.