EPIZOOTIC KERATITIS 21 



solution of zinc sulphate of from two to four per cent 

 strength is to be used. It is best applied with a small 

 glass syringe having a soft rubber tip. 



With the owner or an attendant holding the cow's 

 head, the person giving the treatment draws the lower 

 eye-lid away from the globe, by pulling on the lashes ; 

 about a teaspoonful of the zinc sulphate solution is 

 then squirted into the cup thus formed and the lid 

 allowed to return to position. This is repeated three 

 times daily until the most acute symptoms have dis- 

 appeared. The treatment is then terminated, with 

 daily applications of the yellow oxid of mercury oint- 

 ment. In complicated cases that develop ulcers on the 

 cornea the ulcers should be touched up every other 

 day with ten per cent silver nitrate solution, by means 

 of a cotton swab on an applicator. Staphylomata that 

 occur in the form of sacculated protrusions of the 

 iris following perforation of the cornea from ulcer- 

 ation, should be snipped off with scissors and then 

 cauterized. Before either the cauterization of an ulcer 

 or the ablation of the staphyloma is attempted the eye 

 should be anesthetized. The simplest and most con- 

 venient method of anesthetizing the eye is by placing 

 a one grain quinin-urea hydrochlorid tablet between 

 the lids, and waiting about twenty minutes for anes- 

 thesia to become established. 



Collections of pus in the lower part of the anterior 

 chamber of the eye are best ignored. They usually 

 become absorbed without producing particular damage. 

 Opacities of either the cornea or the lens that remain 

 after the inflammation are best treated with iodides 

 internally. 



Synechia (adhesions between the iris and cornea 

 anteriorly, or the iris and lens posteriorly) can usually 

 be prevented by the addition of a few drops of fluid 



