Rabbits Only Blink Once Every 5 Minutes

The fact that rabbits only blink once every five minutes is one of the interesting things about rabbits. Humans blink 10–20 times each minute in comparison. That is fifty times as often as a rabbit blinks.

Because their third eyelid, a flimsy membrane that covers the eye, is so thin, rabbits can get away with rarely blinking. You cannot see anything of this membrane because it is entirely translucent. A rabbit's eye is protected from dust and debris and kept moist by its third eyelid. Because the membrane of the third eyelid does the majority of the job, your rabbit doesn't need to blink very frequently.

Rabbits who blink less frequently are better able to maintain their alertness. A rabbit can survey the surroundings for danger without having to often avert their eyes by blinking. Additionally, it is because of this membrane that rabbits can easily sleep with their eyes open.