![]() The extraocular muscles execute eye movements and are innervated by three cranial nerves. When this fails, diplopia (double vision) results.Ĩ.2 Extraocular Muscles and their Innervation They coordinate the movement of the two eyes to ensure that the images on the two retinas fall on corresponding areas of the binocular field. Such eye movements are controlled by gaze systems. Eye movements are also controlled to direct the eyes towards a visual target and to follow the movements of the visual target. ![]() ![]() For example, in addition to producing adjustments in pupil size and lens refraction, accommodation involves the convergence of the two eyes to direct onto the foveae the images of near objects. Normal visual perception requires the proper functioning of ocular motor systems that control the position and movement of the eyes to focus the image of the object-of-interest (i.e., the visual target) on corresponding areas of the retinas of the two eyes.
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