A transparent inner eyelid is called the nictating membrane. It protects the frog's eyes when the animal is underwater. :-) If you've ever noticed a frog blinking when it eats, it's because it uses its eyeballs to swallow. It can't chew its food effectively, or use its tongue to push food down its throat, so instead it uses its eyes. The eyes sink down into the skull, pushing the food along..!! :-D From: animal.discovery.com/tv/vanishing-frogs/anatomy/frog-eyes...
An endangered frog endemic to the Western Ghats..Earlier It was called Philautus neelanethrus.. neelanethra means blue eyed in ... Now it is called Raorchestes luteolus :-)A short video goes here: www.youtube.com/watch?v=xdXPEoC8_fg&feature=plcp
I have been trying to find this little guy for some time now. A very very alert frog. Always deep inside the thickest of bushes. Moreover he would make it almost impossible for me to find him by stopping his call on the slightest movement. Finally I got lucky yesterday :-)Species Information here: www.iucnredlist.org/details/summary/58928/0