SOUND AND UNSOUND HORSES 



Cataract. — Examine both eyes very 

 critically for the presence of this ocular 

 defect. Some cataracts are verv small, 

 appearing, in the illuminated eye, as a 

 stellate, greenish-grey opacity. 



When using the catoptric test, bear 

 in mind that there should be three 

 images of the flame, viz., two erect, 

 moving in the same direction as that 

 of the candle, and one, inverted, mov- 

 ing in an opposite direction. 



In cataract, the last named is either 

 absent, or else indistinct. Ophthal- 

 moscopic examination should be em- 

 ployed in doubtful cases. 



Adhesion of the Iris to the Lens. 



— ^The pupil contracts irregularly 

 if partially adherent. Frequently result 

 of iritis. 



Displacement of Corpora= Nigra- 



— Has been known to cause 

 shying. 



^H 



