CYSTS AND TUMORS OF THE IRIS 541 



prominently involved a turbidity of the corneal margins is 

 noted. Exudate, which has passed through the pupil, 

 reaches the anterior chamber producing the same symptoms 

 as iridian exudate. The iris may be only slightly involved 

 as is determined by its color, striations and reaction to 

 light. 



Course. The course in iridocyclitis is usually short. The 

 inflammation rapidly subsides and the exudate is quickly 

 resorbed. A few cases become chronic and lead to posterior 

 synechia. 



Prognosis. In uncomplicated cases the prognosis is favor- 

 able. When the choroid or retina is involved the prognosis 

 is guarded. 



Treatment. When secondary to constitutional diseases, 

 distemper, etc., these should receive attention. Local 

 treatment consists in instilling atropin solution (0.5 to 1 

 per cent.) once or twice daily, which paralyzes the accom- 

 modation, relieves pain and congestion and prevents adhe- 

 sions. Dionin solution (4 per cent.) is also useful to stimulate 

 the lymph circulation. Hot applications in the form of a 

 hot-water compress are of great service. They should be 

 applied for an hour at a time during the first twenty-four 

 to thirty-six hours. Antiseptic and astringent solutions, 

 such as succus cineraria maritima compositus (50 per cent.), 

 or ichthyol (4 per cent.) may also be used. Complications 

 should be treated as they arise. 



CYSTS AND TUMORS OF THE IRIS. 



Cysts involving the iris are quite rare. They most often 

 result from injury and appear as enlargements on the iris. 

 It is difficult to distinguish between cysts and tumors. 

 They are treated by puncturing, under antiseptic precau- 

 tions, with a knife needle inserted through the corneal 

 margin. 



Both benign and malignant tumors may involve the iris. 

 Melanoma is the most frequent primary tumor. Sarcomas 

 and carcinomas also occur. They usually extend from 

 adjacent structures which are their primary seats. Treat- 

 ment consists in enucleating the eyeball. 



