372 Veterinary Medicine. 



Locally use pyoktannin solution (i : looo) or mercuric chloride 

 (i : 5000) injecting under the lids so as to bring it in contact 

 with the whole diseased surface. A cloth wet with the same solu- 

 tion may be hung over the eye. Boric acid (i : 100), salicylic 

 acid (i: 1000), or silver nitrate (i : 100) may be substituted for 

 the above when they seem to be losing their efiEcacy. 



Ulcers are treated by pyoktannin or silver nitrate solution ap- 

 plied daily with a soft brush. Keratitis will demand atropia. 

 Abnormal tension or staphyloma will demand puncture of the 

 cornea. Improvement may be expected in a few days and re- 

 covery in a week or ten days. 



VARIOIvOUS CONJUNCTIVITIS. 



In cow pox, horse pox, and above all sheep pox, the infec- 

 tion sometimes falls on the conjunctiva, giving rise to the for- 

 mation of the specific eruption on that membrane. The co- 

 existent eruption on other parts of the body (udder, heels, 

 hairy portions of skin) of the specific variolous eruption, fur- 

 nishes the means of a satisfactory diagnosis. The lesions in 

 the eye develop rapidly to an extreme severity. The lids are 

 swollen and closed, lachrymation abundant, and early mixed 

 with pus, and when exposed the conjunctiva is strongly con- 

 gested with circumscribed areas of elevation. In cow pox these 

 are circular in form, raised above the surrounding mucosa, 

 having a deep red areola and a paler, flattened center. In sheep 

 pox the elevations have the same general character, but are liable 

 to be more numerous and confluent, and tend to permanent 

 opacities, cicatrices, and perforations of the cornea with loss of 

 the eye. Short of perforation, internal inflammations are not un- 

 common. 



Treatment. At the outset this form may be aborted by the 

 application of silver nitrate solution (2 : 100) or sodium hyposul- 

 phite (ij^ : 100). Otherwise the local treatment is like that for 

 simple conjunctivitis, cooling astringent and sedative lotions, and 

 if need be, derivatives and eliminants. 



