Simple Iritis. 397 



atropia or other sedative agent may be made of the strength of 

 I : 100 and a drop or two placed inside the lids with a dropper 

 every two or three hours. 



A blister of biniodide of mercury may be applied to a space 

 the size of a dollar above the anterior end of the zygomatic ridge, 

 or in dogs back of the ear on the side of the neck : or a seton 

 may be passed through the skin in the same situation. 



When the eyeball is unduly tense, puncture through the mar- 

 gin of the cornea with a fine aseptic lancet will relieve the tension 

 and in some cases induce a more healthy action. Assiduous anti- 

 .sepsis is needful until the wound has healed. 



In other cases benefit can be obtained from the use of an oint- 

 ment of yellow oxide of mercury i part, in vaseline .10 parts, or 

 of iodoform of the same strength. A small portion the size of a 

 grain of wheat is put under the lid, and the latter manipulated 

 with the finger to bring it in contact with all parts of the surface. 

 In case of a rheumatic origin, salicin and salicylate of soda are 

 demanded. 



SIMPI^E IRITIS. 



Causes. Symptoms : redness of sclera, in dogs, cats, birds, pigs, with a 

 narrow zone of white next the cornea, red scleral vessels immovable, iris 

 dull gray or brown, uneven, sluggish in response to light, synechia anterior 

 or posterior, lens and capsule clouded or clear, pupillary margin uneven, 

 myosis or midriasis, black cataract. Treatment : rest, dark stall or covering, 

 head elevated, midriatics, cocaine, antiseptic puncture, purgation, leeches, 

 seton, cooling astringent lotions, diuretics, for tension in convalescence 

 iridectomy. In traumatic cases careful antisepsis. 



This may come from any one or more of the causes of internal 

 ophthalmia above named. The inflammation, however, concen- 

 trates itself on the iris so as to overshadow the disease in the ad- 

 jacent organs. 



The more distinctive symptoms are the redness of the sclerotic 

 in unpigmented organs (swine, birds, dogs, cats), the redness in- 

 creasing as it approaches the margin of the cornea but leaving a 

 narrow white zone surrounding the edge. The red vessels on 

 the sclerotic are not moved with the conjunctiva when the lid is 

 moved over the front of the eye. The front of the iris is dull, 



