It's not so much as how they retract their eyes (im pretty sure they use muscles for that) as to what the eye retraction actually does. Frogs actually retract their eyes in order to swallow. Their eyes get pulled into the sockets and bulge in the top of their mouths, which helps them swallow. It is strange, but true. XD
That means a frog can't use its tongue to push food down its throat and toward its stomach. the reason is that when a frog swallows, its eyes sink down into its skull to help push the food along with its mouth closed. the frog forces air from this sac back and forth over its vocal cords because frogs can during through its skin.
It helps them swallow their food.
They retract their eyes down into their throats to push the food down.
9578. Last I checked, frogs had two eyes each. Multiply the number of frogs by 2, genius.
big eyes
No.
According to biologists, the protruding eyes of a frog help it to see all of its surrounding day and night. In addition, the eyes are water resistant and the frogs are able to rotate their eyes because they are unable to turn their heads around when detecting approaching predators.
yes
No.
No it stickes
Yes!
You don't make a frogs eye bulge.
No, frogs usually close their eyes when swallowing their food. The muscles related to their eyes help them in the process of gulping food down their throat.