Eye movement refers to the motion of the eyes as they shift focus from one point to another. This movement is essential for various visual tasks, such as reading, scanning the environment, and tracking moving objects. The eyes can move in different ways, including saccades (quick jumps), smooth pursuits (following a moving object), and fixations (holding gaze on a single point). These movements are controlled by a complex system involving the brain and muscles around the eyes. The oculomotor nerve, along with other cranial nerves, coordinates these actions to ensure clear and stable vision. Understanding eye movement is important in fields like optometry and neurology.