37 



ally covered with long hair that project outward between the 

 jids. (See fig. 10). 



Fig. 10. 

 Dermoid. — Left eye of dog (after Gurlt). 



It occurs in calves, pups, colts and lambs and is most fre- 

 quently present at birth ; but, according to some authors, it 

 may be acquired after birth. The hairs interfere with the 

 rays of light and the dermoid, as a whole, irritates the cor- 

 nea and conjunctiva. Treatment consists in removing the 

 dermoid by means of the knife or shears. The animal is 

 cast and the eye is anesthized with cocaine; then the loosely 

 attached skin-like growth is carefully dissected from the 

 cornea and conjunctiva; a permanent opaque spot remains, 

 but the constant irritating action is removed. 



DISEASES OF THE lEIS. 



Ikitis or inflammation of the iris is generally associated 

 with diseased conditions of the ciliary bodies, or the choroid 

 coat; because, a close connection exists between these parts 

 of the eye, in location, attachments and blood supply. 



Iritis also appears in the course of inflammation of the 

 entire eye ball, in periodic opthalmia (moon-blindness) ; it 

 occurs also, in some instances, in connection with influenza, 

 strangles (distemper), infectious inflammation of the lungs 



