This cross section through the head of a jumping spider shows off the interior structure of four of its eight eyes. Jumping spiders have the most acute vision of any terrestrial invertebrate. In fact, ...

The spiders ... Up to 4.7 inches from leg tip to leg tip, about the size of the palm of your hand. Females have larger bodies while the males have longer legs. Vision: They have eight eyes of ...

And those are spider eyes looking back at you,” he said ... the orb weavers under a microscope to observe their biology up close. That’s when he truly became fascinated with them, he said.