What is the function of the nictitating membrane covering a frog’s eye?
Frogs’ nictitating membranes provide a protective layer over their eyes, letting debris bounce off harmlessly as the frogs swim underwater. The membranes keep the water out of their eyes, letting them watch where they’re going while keeping their eyes protected.
What does the nictitating membrane do for amphibians?
In amphibians, nictitating membranes provide a layer of protection during activities such as swimming, resting, or handling prey. The membranes are usually translucent, so the animals are still able to see to some degree even when their third eyelids are deployed.
