Muscular fascia

The muscular fascia of the eyeball is the part of the fascial sheath (capsule of Ténon) that it is perforated by the tendons of the ocular muscles, and is reflected backward on each as a tubular sheath:

• The sheath of the Obliquus superior is carried as far as the fibrous pulley of that muscle; that on the Obliquus inferior reaches as far as the floor of the orbit, to which it gives off a slip.
• The sheaths on the Recti are gradually lost in the perimysium, but they give off important expansions.
• The expansion from the Rectus superior blends with the tendon of the Levator palpebræ; that of the Rectus inferior is attached to the inferior tarsus.
• The expansions from the sheaths of the Recti lateralis and medialis are strong, especially that from the latter muscle, and are attached to the lacrimal and zygomatic bones respectively. As they probably check the actions of these two Recti they have been named the medial and lateral check ligaments.