What is the purpose for simple eye on grasshoppers?

Simple eyes, also called ocelli or stemmata, have a limited visual range and are used to detect changes in light intensity, the position of the sun, and to help grasshoppers navigate in their environment. Unlike compound eyes, which have multiple facets and provide a detailed image, simple eyes simply sense the presence of light and its direction. They are particularly useful for detecting predators, allowing grasshoppers to quickly move away from potential threats. By using simple eyes, grasshoppers can rapidly respond to changes in their surroundings and avoid danger, contributing to their survival and successful adaptation in various habitats.