EYE 77 



riorly. The lens is enveloped in a thin, transpar- 

 ent membrane, known as the capsule of the lens. 



9. The Suspensory Ligament is a very delicate 

 membrane attached to the capsule at the edge of 

 the lens. It suspends the lens from the ciliary 

 processes. 



10. The Ciliary Muscle is a ring of radiating mus- 

 cular fibres, arising from the sclerotic at the edge 

 of the cornea and passing backward to the cho- 

 roid opposite the ciliary processes. By its contrac- 

 tion the lens is made more convex. 



11. The Iris is the anterior portion of the cho- 

 roid. It forms a perforated circular disc at the 

 front of the crystalline lens. The perforation is 

 known as the pupil. 



12. The Aqueous Humor is the fluid filling the an- 

 terior chamber of the eye, between the lens and 

 the cornea. 



