THE EYE 



1089 



It is perforated by the ocular muscles, and is reflected backward on each as a 

 tubular sheath. The sheath of the Superior oblique is carried as far as the fibrous 



SUPERIOR 



TARSAL 

 MUSCLE 



OPTIC NERVE- 



CAPSULE 

 OF TENON 



FIG. 794. The right eye in sagittal section, showing the capsule of Tenon (semidiagrammatic). (Testut.) 



pulley of that muscle; that on the 

 Inferior oblique 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 epimysium, 

 but they give off important expan- 

 sions. The expansion from the 

 Superior rectus blends with the ten- 

 don of the Levator palpebrae; that 

 of the Inferior rectus is attached to 

 the inferior tarsal plate. These two 

 Recti. therefore, will exercise some 

 influence on the movements of the 

 eyelids. The expansions from the 

 sheaths of the Internal and External 

 recti are strong, especially the one 

 from the latter muscle, and are at- 

 tached to the lacrimal and malar 

 bones respectively. As they probably 

 check the action of these two Recti, 

 they have been named the internal 

 and external check ligaments. 



Lockwood has also described a thickening of the lower part of the capsule of 

 Tenon which he has named the suspensory ligament of the eye. It is slung like a 



69 



FIG. 795. The capsule of Tdnon. The aponeurosis is 

 seen from behind forward on the posterior hemisphere of 

 the globe, a. Cellulofibrous intermuscular lamina. 6. Deep 

 leaf of the sheath incised at the point where it leaves the 

 muscle to fold itself on the posterior hemisphere when 

 it forms the posterior capsule, d. Partly incised, c. 

 Serous membrane. (Poirier and Charpy.) 



