Net-casting spiders have the largest eyes of any spider on Earth. But only two of their eyes are enormous; the other six are small and have diminished vision. To get a better idea of how these spiders use their gigantic eyes, researchers painted temporary coverings over the spiders' eyes, and watched the arachnids catch prey.
As it turns out, these large eyes are crucial in helping the spider to hunt at night (when there is less light) and to catch prey that walks by the arachnid's web.[Read the Full Story on These Big-Eyed Spiders]