THE HOKSE, ITS DISEASES. 429 



one from the front surface of the lens, and one from the rear surface of 

 the lens. If in moving the light either of the posterior images are 

 changed into a white haze, there is exudation into that part of the lens ; 

 in other words, a cataract is forming. 



What to do — Unless the cataract is only just forming the horse will 

 be eventually blind. Give aloes as recommended for moon-blindness, 

 mnd also the prescription for lotions in that case. Follow this up with 

 digitalis in doses of fifteen to twenty grains daily, alternated daily with * 

 six to eight drachms of niter in the water taken. Keep the animal in a 

 dark room ; apply blisters to the cheeks and behind the ears, using the 

 following, well rubbed in ; 



No. 167. 2 Drachms powdered cantharides, 



K Ounce lard. 



Mix thoroughly and rub well in, treating the blisters when formed with 

 linen cloths covered with mutton tallow to keep them running. 

 Apply also to the eye daily for several months the following : 



No. 168. 2 Grains phosphorus, 



1 Ounce ahnond oil. 



M>x and keep in a dark, cool place, in a bottle with a ground glass 

 stopper. 



V. Inflammation of the Haw, or Hooks. 



The haw is a triangular shaped cartilage situated just within the inne> 

 comer of the eye. In health but little of it can be seen. Its use is to 

 pass over the ball of the eye to remove dust or other offensive substances 

 from the eye. This is done so quickly that it is difiicult to distinguish 

 the action. Its play may be seen by opening the lid of the eye, or by 

 «ittempting to touch the eyeball with the fingers. 



Causes. — This is often produced by inflammation or swelling of other 

 parts of the eye. It may end in producing a hard, bony state, protrud- 

 ing from its place as a whitish lump. When it presents this appearance 

 some persons are fond of cutting out the * ' hooks ' ' to keep the horse 

 from "going blind." Our advice is, " Don't do it." 



What to do. — ^If there is inflammation and swelling, treat the eye as 

 for ophthalmy (inflammation). In all cases of inflammation of the eyes 

 use the bandage as sho\\Ti in the cut on next page. 



If the inflammation is slight, but active, keep a linen cloth over the 

 eye, or eyes, saturated with the following : 



