Eye anatomy and muscles. Coloured coronal magnetic resonance imaging (MRI) scan passing vertically through the head of a 33-year-old man, seen from the front, with the scan passing just behind the eyes. This scan shows some of the normal structures of the eyes and their support tissues, including the eye muscles (grey blocks) and the optic nerves. The section is at the level of a structure known as Tenon's capsule or the bulbar sheath. The muscles shown here are the superior, lateral, medial and inferior orbital muscles of each eye. Parts of the brain and nasal sinuses are also visible on this scan. This is a T1-weighted scan, with injection of gadolinium contrast medium. For a labelled version of this scan, see image C033/7451.
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