Do sharks go blind for a moment when biting there prey?

Sharks do not go blind when biting their prey. This belief is likely based on the fact that sharks have a nictitating membrane, a transparent eyelid which covers the eye and helps to protect it from damage. Some people mistakenly believe that this membrane becomes opaque when the shark bites, blocking its vision. However, the nictitating membrane is transparent, and does not interfere with the shark's vision.