Rabbit eyes are usually red because the transparent structure of the rabbit's eyes allows the color of blood in the blood vessels to be reflected. The eyes of the white rabbit are especially red because the white rabbit's body does not contain pigments, and its eyes are colorless and transparent.
However, rabbits' eyes aren't just red, their eye color is actually related to the color of their fur. Rabbits containing gray pigment have gray fur and eyes;Rabbits that contain melanin have black fur and eyes.
In addition, the rabbit's eye color is also closely related to its physiological structure and survival strategy. First of all, rabbits do not have pigment cells in their bodies, which makes their eyes appear transparent. And the blood vessels are the only place in the rabbit's body that contains hemoglobin, which absorbs the red part of light, which explains why we always see rabbits' eyes red. Secondly, the rabbit's red eyes can be used as a warning color in the wild to help them avoid being detected by predators, while the presence of transparent eyes also allows the rabbit to better integrate into the environment when camouflaged. Finally, since rabbits are nocturnal, their eyes are able to concentrate a lot of light and see objects clearly even in dim environments.