BISSECTION OF THE EYEBALL. 



265 



Pt line the cornea, but terminates beliind the line of junction of that 

 ^.m ^'it^ the sclerotic, by a thickened edge—the ciliary processes. At 



Fig. 36. 

 View of the Lower Half of the Right Adult Hdman Eye, divided horizontally 



-THROUGH THE MIDDLE. MAGNIFIED FOUR TIMES (A. TkomSOn). 



1. The cornea ; 1'. Its conjunctival layer ; 2. The sclerotic ; 2'. Sheath of the optJc nerve passing 

 into the sclerotic ; 3. 3'. The choroid ; 4. Ciliary muscle, its radiating portion ; 4'. Cut fibres of the 

 circular portion ; 5. CiH^ary fold or process ; G. Placed in the posterior division of the aqueous 

 chamber, in front of the suspensory ligament of the lens ; 7. Tlie iris (outer or temporal side) ; 7'. The 

 smaller, inner, or nasal side ; 8. Placed on the divided optic nerve, points to the arteria centralis 

 retina; 8'. Papilla optica at the passage of the optic nerve ihto the retina; S". Fovea centralis 

 retinse ; r. The nervous layer of the retina; )■. The bacillary layer; 9. Oia serrata, at the com- 

 mencement of the ciliary part of the retina; 10. Canal of Petit; 11. Anterior division of the 

 aqueouschamber, in front of the pupil; 12. The crystalline lens, within its capsule ; 13. Thevitreous 

 humour ; a. a. a. Parts of a line in the axis of the eye ; b. v. b. 0. A line in the transveise diameter. 



