22 SPECIAL CATTLE THERAPY 



extract of belladonna (or a solution of atropin) to the 

 zinc sulphate solution. This will produce mydriasis 

 sufficiently to Avithdraw the iris from the active field 

 of the disease. 



Darkened quarters are essential in all cases, because 

 of the marked photophobia. The affected cattle should 

 be kept out of bright light until recovery is assured. 

 Light should be excluded from the stable by means 

 of blankets or canvas hung before windows and doors. 

 Bandages should not be used with the object of shield- 

 ing or protecting the eye. Their use favors ulceration. 



CANCER OF THE EYE 



This condition, sometimes termed fungus hema- 

 toids, is decidedly common in cattle. Only one eye 

 is affected as a rule, and the condition comes to the 

 attention of the veterinarian in various stages, from 

 the benign appearing granular growth on the edge of 

 the cornea to the immense cauliflower-like growth in- 

 volving the entire orbit. 



Most of these cases begin as a small, flat mass of 

 granular tissue near the corneo-scleratlc margin. The 

 mass stands off from the globe quite prominently and 

 has the appearance of w^hat is commonly termed 

 ''proud flesh." This slowly spreads over the surface 

 of the eye-ball ; in most cases, at first, in a thin, flat 

 layer. Later, there is a purulent flow of mucus from 

 the affected eye, and the growth begins to assume the 

 form of a ''bunch," layer after layer of now cells be- 

 ing formed. This continues until the growth projects 

 outward an inch or more. The tissue is very vascular ; 

 slight handling or touching in any manner induces 

 bleedinej. Still later the external surface of the mass 



