398 Veterbiary Medicine. 



when convalescence has apparently set in. Strangles is another 

 affection in which the iris occasionally suffers. Matthieu has 

 described tuberculosis of tlie iris in cattle, and Moller mentions 

 with some hesitancy ca.sesof iritis which complicated the infection 

 of the navel in new-born animals. 



The symptoms of symptomatic iritis vary according to the par- 

 ticular infection. In addition to the fibrinous exudate the in- 

 fections of the respiratory organs are liable to be complicated by 

 blood extravasations. In influenza this may show as deep blotches 

 on the bulbar conjunctiva and in chemosis. In contagious 

 pneumonia Shiitz met with iritis of a distinctly hsemorrhagic 

 character. 



In Matthieu's cases of tubercle of the iris there was fir.st a 

 slight lachrymation, and soon the iris assumed a grayish tint, and 

 became uneven and unduly approximated to the cornea though it 

 failed to become adherent to it. The swellings of the iris in- 

 creased and became of a grayish yellow color, and the pupil was 

 usually contracted and varied little in size. Post mortem ex- 

 amination showed the presence of tubercles. The same con- 

 dition has become familiar in connection with experimental inocu- 

 lation in the eye. As in ordinary iritis adhesion to the capsule 

 of the lens and cataract are common results. 



Apart from the treatment of the specific primary disea.se this 

 type of iritis demands the same treatment as other forms. Strong 

 atropia lotions to prevent or break up adhesions and antiseptic 

 astringents are especially indicated. When implication of the 

 second e5^e is threatened it may be desirable to remove the first 

 by enucleation. (See Panophthalmitis). 



FOREIGN BODIES IN THE IRIS. 



These are sometimes fine shot particularly in dogs, and splinters 

 of iron and steel in other animals. Their presence can sometimes 

 be made out by careful focal illumination. If septic they cause 

 violent iritis and panophthalmia. If a.septic they may sometimes 

 cause little trouble. If they can be exactly located, they should 

 be removed at once before the aqueous humor and cornea become 



