LESSON III. 



THE EYE. 



22.— We now come to one of the four principal 

 things which you hare to see is sound and all 

 right in buying a horse — namely, the eye. First 

 take a glance at both eyes in good daylight^ 

 and compare their size. It is of the highest im- 

 portance that they should be both one size, be- 

 cause if one is less than the other it is very likely 

 that the lesser one has been attacked with in- 

 flammation which is called 'opthalmia.' Now 

 ^ opthalmia ' is a disease that returns again and 

 again, and destroys the sight. One of its effects 

 is very often to leave the eye it has attacked 

 smaller than its fellow. It also leaves other evi- 

 dences, but these require a properly qualified 

 veterinarian to discover. 



The color of the two eyes may not be alike and 

 yet the eyes may be quite sound. The color of 

 the eye depends upon the coloring matter in the 

 iris, a structure to be spoken of by and by. It 

 may be absent in one iris, and brown or some 

 other color in the other iris. The iris which con- 

 tains no coloring matter will be white, and the 

 horse is thus said to have a 'wall' eye. This 

 white or ' wall ' eye is as good as its f eUow-eye, 

 but it gives the horse an odd appearance which at 



