The rabbit is an adorable animal, and one of its most striking features is its red eyes. Why are rabbit eyes red? This is explained from a biological and anatomical point of view.
First, we need to understand the structure of the rabbit's eyeball. The rabbit's eyeball has a structure called the choroid, which is located between the retina and the sclera, and its main role is to provide nutrients and oxygen to the retina. And the color of this choroid directly determines the color of the eyeball. In rabbits, the color of this choroid is orange-red, so the rabbit's eyeball appears red.
In addition, the surface of the rabbit's eye is covered with a structure called the "iris", which adjusts the size of the pupil according to the intensity of the light, and thus the amount of light entering the eye. The rabbit's iris is particularly thin and covered with blood vessels that reflect light, further enhancing the red effect of the eyeball.
Of course, there are some evolutionary reasons why rabbits' eyes are red. In the wild, rabbits mainly rely on vision to perceive their surroundings, and red eyes can help them better observe their surroundings at dusk or dawn, because these times the light is darker, red eyes are able to absorb light better and improve visual sensitivity. In addition, red eyes allow rabbits to communicate better visually with other rabbits, helping them maintain order and communication in groups.
In summary, the reason why rabbit eyes are red is mainly due to the color of the choroid inside the eyeball and the reflex action of the blood vessels on the iris. In addition, red eyes also help rabbits survive and socialize.