how does a frog not look into the sun?

[alane]

they have pretty much 360 degree vision, with their eyes on top of their heads. And some of them just sit all day, eyes opened.

at some point in its life, that frog will be in the sun.

so how does a frog not go blind?

[elly]

Many of them are nocturnal and they do have eyelids. Also I don't think they can see directly overhead.