A close-up of a Goldenrod crab spider showing its four pairs of eyes. The forward most eyes are capable of forming images. This is an unusual feature for eyes of this structure, called pigment-cup ocelli. The other six eyes are only capable of telling which direction the light is coming from, with the help of a reflective membrane. They are not compound eyes (as are seen in insects), which have numerous lens-like facets.
Goldenrod Crab Spiders can change color from yellow to white to match the flowers they live on. This ability involves transport of yellow and white pigments to the skin surface using information gathered from the eyes, as a spider with painted eyes cannot change its color.