Diseases of the Eyes. 335 



from tlie pastures or buildings wliere the malady has ap- 

 peared. Give the affected strong purgatives (salts) fol- 

 lowed by diuretics (nitre), place in a dark, quiet, dry 

 building, and keep a cloth over the eye saturated with a 

 Bolution of a drachm each of nitrate of silver and carbolic 

 acid and 10 gr&. of morphia to a quart of distilled water. 

 BHsters may be appHed to the cheeks or behind the ears 

 (Spanish flies 2 drs., lard f oz., for cattle ; twice the 

 amount of lard for sheep ; rub well in). The resulting 

 ulcers may be treated in the ordinary way. 



INTEENAL OPHTHALMIA. INFLAMMATION OF THE DEEP STBUGT- 

 UEES OF THE EYEBALL. IRITIS. CHOROrDITIS. BETINITIS. 



Causes. Severe blows or other forms of local irritation ; 

 jixtremes of darkness and Ught ; exposure to a draught of 

 cold air, to a storm ; various constitutional disturbances, 

 especially those of the digestive organs. 



Symptoms. Like those of superficial ophthalmia, but 

 with more fever, constitutional disturbance, accelerated 

 pulse, loss of appetite, increased heat of body, and above 

 aU with retraction of the eye into its socket, pro- 

 trusion of the haw from its inner angle over its surface, 

 closure of the lids and contraction of the pupil when 

 brought into the Hght, and the presence of a turbid liquid 

 behind the transparent cornea, with white floating flakes, 

 and a yellowish or whitish deposit at the bottom of the 

 chamber. The brilliant reflection of the iris or curtain 

 is also largely impaired. As the disease advances a white 

 speck or cloud appears in the lens, behind the pupil and 

 iris. 



Treatment. Place in a dark building with pure, dry 

 air, purge (cow, salts ; horse, aloes ; dog, castor-oil,) and 

 follow up with febrifuges (nitre, digitalis ; in dogs or pigs 

 tartar emetic) ; apply alternately by means of a rag over 

 the eye a lotion of 20 grs. acetate of lead, 20 drops extract 

 of belladonna and 1 quart water, and one of 20 grains 

 sulphate of zinc, 20 drops of tincture of (physostigma) 



