The term "eye stalk" refers to a protruding extension from the head that houses the eye in many different types of animals. Synonyms for this biological structure include "ocular peduncle," "visual stalk," "optical stalk," and "eyestalk." These terms are commonly used in scientific literature to describe the same basic anatomical feature found in crustaceans, insects, and mollusks. While there may be subtle variations in the structure of the eye stalk depending on the species in question, the function remains the same: to provide the animal with an improved ability to scan its surrounding environment and detect potential food or predators.