Vision problems can occur from trauma to the eye, such as scratches causing corneal ulcers, Dziezyc points out. We don't have very effective methods to treat viral diseases, so they can be a real problem. Infectious diseases, such as feline leukemia, can also create vision troubles for cats. The animal may squint a lot, the color of the eye may actually change and the eye becomes very bloodshot. These are all bad signs and the animal should be taken to a veterinarian quickly.
Horses also can get eye problems, such as fungal diseases, trauma inflammation in the eye.
Mammals' eyes are pretty much the same. If we get a sharp blow to the eye, it can be damaged. The same is true for animals. We can get certain diseases that affect our vision, and so can animals. As we get older, we tend to get more vision trouble, and so do animals.