Snakes have no eyelids, so they can never close their eyes or blink. Instead of eyelids, thin clear membrane cover their corneas, called spectacles or brilles. These are attached to their skin. Although they can not close their eyes, they can close the retinas when they are sleeping.
This is true since snakes do not have eyelids. I actually own 2 ball pythons and a boa so I know this is false.
Hope this helps.
