THE EYE. 375 



only temporary. When the eye cannot be any longer 

 used as an organ of vision the retina atrophies. This 

 is to be seen in cases of cataract. (' Veterinarian/ vol. iii^ 

 p. 141.) 



Section 5. — Diseases op the Organ op Taste. 



We have already dealt with the abnormalities of the 

 tongue (Chap. TV, Section 1). Perversion of Gustation is 

 generally present in cases of depraved appetite. 



