428 Veterinary Medicine. 



careful massage over the eyeball so as to favor the progress of 

 the lymph out of the bulb. A prompt but rather transient relief 

 can be obtained from evacuation of the aqueous humor by punc- 

 ture with a lancet close to and parallel with the margin of the 

 cornea. The most effective treatment is, however, by iridectomy. 

 On account of the great power of the muscles in the lower ani- 

 mals it is usually desirable to anaesthetize the patient and then 

 fixing the eyeball with a pair of rat-tooth forceps, an incision is 

 made close in front of the upper border of the cornea, and the 

 lancet slowly withdrawn. A pair of iridectomy forceps are then 

 introduced and the iris seized and drawn out through the wound, 

 and a portion snipped ofE with a pair of fine scissors. The iris is 

 then pushed back into the anterior chamber, and a drop of eserin 

 solution placed in the eye. The parts and instruments must be 

 rendered thoroughly aseptic before the operation, and the eye 

 cocainized both before and aft6r. The eye should be kept covered 

 for some time with a cloth wet with a solution of mercuric 

 chloride (i : 5000) or other antiseptic. 



Appropriate treatment may be employed in case of co-existent 

 inflammation, or to improve the general health. 



EXOPHTHALMOS. 



This consists in an increase of the media of the eye so as to 

 cause an excessive increase in size, and an unsightly bulging 

 outward from the orbit and between the lids. It may be said to 

 be a more exaggerated enlargement of the eyeball, than has been 

 already noticed under glaucoma. 



It has been seen in nearly all classes of domestic'^animals. 

 Everhardt and MoUer reports it in horses, Hausmann, Pradal, 

 etc. , in cattle, LaNotte, in lambs. Coster, Trasbot, etc. , in dogs, 

 and Trasbot, in birds (chickens and parrots). It has been found 

 congenitally in lambs and at a few days old in foals, especially 

 when weak and puny ; in older animals it appears to be most 

 frequent in the ansemic or starved animal, in the lymphatic, or, 

 as in man, in the goitrous. 



