The eyes other other mammals have some type of pupil that can dilate to let more light in. However, the eyes of rats and mice just seem to just have a large black pupil that doesn’t dilate or contract. Why is that?
In: Biology
Most Rats & Mice have Black eyes which is why they look like they don’t have irises. There are pink eyed ones which are albinos & Ones with Ruby eyes, they look black until they are in bright light then their eyes are dark red, this is caused by a similar gene mutation like the Lutino one in birds, all birds with the Lutino gene mutation have bright yellow feathers & Ruby Red Eyes regardless of breed.
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