1 64 OPHTHALMOLOGY FOR VETERINARIANS 



it is clean or dirty. Even if an object is apparently clean, 

 it may carry bacteria with it into the eye and produce 

 terrific reaction. Punctures through the cornea produce 

 a loss of the aqueous and often a prolapse of the iris into 

 the wound, which may become adherent (anterior syne- 

 chiae) and interfere with the normal pupillary reaction, 

 or the iris is drawn to one side, producing an irregular 

 pupil. Punctures still deeper cause hemorrhage in the 

 anterior chamber by ruptures of the iris vessels. Be- 

 sides these, the lens becomes cataractous through 

 rupture of its capsule. The lens often swells, and all 

 the symptoms of glaucoma accompany the accident. 



A puncture of the ciHary body by a septic object 

 should always be regarded with apprehension. Pro- 

 lapse of the internal structures of the globe will depend 

 upon the size of the puncture and the resistance of the 

 external coats. Small punctures of the sclera posterior 

 to the ciHary region are usually unimportant from a 

 surgical point of view, though they often produce hem- 

 orrhage within the eyeball and a localized scotoma. 



The results of an incision are very much the same as 

 those of a puncture, though there is more probability 

 of a better and more rapid union of the wound by sutur- 

 ing the same. 



Lacerations are probably the most severe type of 

 injuries to the globe. The result of a laceration depends 

 upon the extent and the part injured. 



Injuries are nearly always confined to the anterior 



