THE ACCESSORY ORGANS OF THE EYE 



1027 



The Palpebral Portion (tunica conjunctiva palpebrarum) is thick, opaque, highly 

 vascular, and covered with numerous papillae, its deeper part presenting a 

 considerable amount of lymphoid tissue. At the margins of the lids it becomes 

 continuous with the lining membrane of the ducts of the tarsal glands, and, through 

 the lacrimal ducts, with the lining membrane of the lacrimal sac and nasolacrimal 



Lacrimal artery J 

 and nerve 



Lateral pal- 

 pebral raphe 



^JL Supraorbital vessels 

 and nerve 



I: 



Lacrimal sac 

 Medial palpebral 



ligament 



FIG. 894. The tarsi and their ligaments. Right eye; front view. 



luct. At the lateral angle of the upper eyelid the ducts of the lacrimal gland open 

 on its free surface; and at the medial angle it forms a semilunar fold, the plica 

 semilunaris. The line of reflection of the conjunctiva from the upper eyelid on 

 to the bulb of the eye is named the superior fornix, and that from the lower lid the 

 inferior fornix. 



Puncta lacrimalia - 



FIG. 895. The tarsal glands, etc., seen from the inner surface of the eyelids. 





The Bulbar Portion (tunica conjunctiva bulbi). Upon the sclera the conjunctiva 

 is loosely connected to the bulb of the eye; it is thin, transparent, destitute of 

 papilla?, and only slightly vascular. Upon the cornea, the conjunctiva consists 

 only of epithelium, constituting the epithelium of the cornea, already described 

 (see page 1007). Lymphatics arise in the conjunctiva in a delicate zone around 

 the cornea, and run to the ocular conjunctiva. 



