HOW TO DETECT IMPERFECT VISION IN HORSES. 195 



to the perfection or imperfection of the horse's 

 vision. 



But if the horse should be examined in the open air, 

 the novice should first notice whether both pupils are 

 of exactly the same size. After this he should care- 

 fully place his hand, so as not to alarm the horse, over 

 each eye, to shade off the light, and hold it there for a 

 short time, noticing the extent to which the pupil 

 dilates, then passing his hand over the other eye, as- 

 certain whether it also dilates to the same extent, 

 and if he should still be uncertain, let him place both 

 hands in the position of shades over both the eyes of 

 the horse, and he will at once perceive (if his own 

 vision be good) whether they are perfect, and, if not, 

 which of the two are imperfect. 



I would suggest to all owners of horses the im- 

 portance of admitting plenty of light and pure air into 

 their stables, for I am satisfied that nothing tends more 

 to injure the eyes of a horse and impair his vision than 

 dark, or badly-ventilated stables. Every man who 

 keeps horses for the purpose of assisting him in earning 

 his livelihood would be neglecting a very important 

 portion of his business, by inattention to the lighting, 

 draining, and ventilation of his stables, to say nothing 

 of his imperative duty to treat his horses in the manner 

 they so richly deserve. 



I maintain that horses are as deserving of pure 

 dwellings as the best of God's creatures. The efforts 

 of our Society for the Prevention of Cruelty to Animals, 



o2 



