It includes the medial rectus, lateral rectus, superior rectus, inferior rectus, inferior oblique, and superior oblique. The basic function of these muscles is to provide different tensions and torques that further control the movement of the eye. As we mentioned earlier, the eye of a human being is like a camera.
They are different from the intrinsic eye muscles, which enable the eye to focus on near objects and control how much light enters the eye. Among the extraocular muscles, there are four straight (rectus) muscles and two oblique muscles that work together to move the eye from side to side, up and down, and control its rotation.
The medial and lateral rectus muscles allow the eye to move from side to side while staying level. The superior and inferior oblique muscles let it move up or down and to the side.