288 STABLE MANUAL AND HORSE DOCTOH 



insensible to the stimulus of light. Both may be right in 

 different cases. It is certain, however, that irritation of the 

 brain produces amaurosis, and it often follows staggers. In 

 this disorder the horse shows blindness in his actions rather 

 than in his eyes. He lifts his feet high, moves his ears 

 quickly, and shows himself anxious to supply want of sight 

 by the exercise of other senses. A simple test is waving 

 the hand pretty close to the suspected eye, when, of course, 

 there will be no winking. We have, however, seen a cunning 

 horse-dealer who could make a blind horse wink by the 

 peculiar manner in which he drove the air upon the eyeball 

 and lid while bringing down his hand. We have also seen 

 amaurosis supervene temporarily while the mare has been 

 with foal, which would seem to point clearly to a nervous 

 origin. 



In gutta serena, local applications are of little service. 

 Bleeding from the jugular veins, calomel and opium, or in 

 some cases str\"chnia, may be tried. 



SIMPLE OPHTHALMIA. 



This is common or accidental inflammation, and has 

 generally its origin in a mechanical cause — as blows, injury 

 of the conjunctiva from a whip-lash, hay-seeds, or other 

 matters within the eyelids not being removed by the 

 nictitating membrane, and the like. It is occasionally the 

 consequence of a common attack of cold. 



Siviple inflammation of the eye looks outwardly an 

 affection of the conjunctiva only, whereas specific 

 ophthalmia involves the internal parts of the eyeball. 

 Another distinction is, that in specific ophthalmia there is 

 symptomatic fever, loss of appetite, staring skin, and consti- 

 tutional disturbance. Both disorders, however, are alike in 

 impatience of light, in distension of the vessels of the haw, 

 and sometimes in its extreme protrusion. The cornea, too, 

 is often opaque. From that sympathy which is found to 

 exist between double organs, even when the affection has 

 been entirely brought on by violence done to one eye, the 

 other will by sympathy become affected also, but in a minor 

 degree. Such liability should be borne in mind, as a 

 mistake in this particular might lead the practitioner into 

 important error. 



Treatment — First turn up the eyelid carefully, if the 



