No, a cat will not go blind from eating dog food.
While dog food is formulated for dogs, it's generally safe for cats to eat in small amounts. However, it is not a balanced diet for them in the long term.
Why Cat-Specific Food Matters
Nutritional deficiencies: Dog food often lacks essential nutrients cats require, such as taurine and arachidonic acid. Deficiencies can lead to blindness, heart disease, and neurological issues.
Excess protein: Dog food often has higher protein content, which can strain a cat's kidneys.
Lack of essential fatty acids: Cats need specific fatty acids for healthy vision, skin, and coat. Dog food may not provide enough.
It is always best to feed your cat a diet specifically formulated for them. If you're concerned about your cat's diet, consult a veterinarian.