130 NON-SPECIFIC OR GENERAL DISEASES 



becomes clouded, white and opaque. In severe cases, the blood- 

 vessels around the margin of the cornea become prominent, 

 and ulcers form on its surface. The animal's appetite is impaired 

 or lost. There is loss of flesh and temporary blindness. The 

 blindness in one or both eyes may persist for a period of from 

 two weeks to several months. Permanent blindness is com- 

 paratively rare. 



The preventive treatment consists in practising the necessary 

 precautions against the introduction of the disease into the herd, 

 and in carefully quarantining the first cases of the disease that 

 appear. The affected animal should be given a darkened stall, 

 and fed a very light ration until the acute inflammation has 

 subsided. From one to one and one-half pounds of Glauber's 

 salts should be given. The loeal treatment consists in the appli- 

 cation of antiseptic lotions or powders to the eye. Equal parts 

 of boric acid and calomel, dusted into the eye twice daily with 

 a powder blower, is a very effective treatment. 



QUESTIONS 



1. Name the different structvires that form the shell of the eye: name and 



describe the different media of the eye. 



2. Give the general method of examining the eyes of horses. 



3. What is conjunctivitis? Give causes and treatment. 



4. What is " moonhlindness "? Give the symptoms. 



5. Describe the symptoms of infectious ophthalmia of ruminants and the 



treatment. 



