Fig. 15. Crossing of inferior oblique and inferior rectus muscles as seen from below. Inferior oblique muscle is severed and turned laterally, showing from union between fascial sheaths of the two muscles. Asterisk designates short thick bands of fibroelastic tissue that are seen at a point of crossing of muscles. These fibrous bands cause practically complete fusion between muscle sheaths, resulting in very little, if any, independent action of each muscle. (Fink WH: Anatomy. In Mosby AJ (ed): Strabismus Ophthalmic Symposium. St Louis: CV Mosby, 1950.