DISEASES OF THE EYE. 45 



silver should be applied to it. If this proves ineiFectual, 

 then it must be extirpated by a regular veterinary surgeon. 



ERUPTION ON THE EYELIDS. 



Symptoms. — The edges of the eyelids are occasionally 

 affected with scale-like eruptions. This is always attended 

 with great itching, which causes the horse to rub his eyelid 

 against any projecting part within his reach, in the perform- 

 ance of which it often happens that the animal injures the 

 eye itself. 



Remedies. — The edges of the eyelids should be anointed 

 with the following : — 



Nitrated ointment of mercury ^ ounce, 

 Hogs* lard . , . ^ ounce, 

 Bees' wax . . , ^ ounce. 



A few applications will generally produce the desired effect. 



WARTS. 



The eyelids are sometimes affected with warts, which are 

 very irritating to the animal in consequence of his rubbing 

 them on some prominent part : this causes them to bleed, 

 and increases their number. 



They should be cut off with a pair of sharp scissors, and 

 the roots touched with nitrate of silver, lunar-caustic, or 

 blue vitriol. 



GUTTA SERENA. 



Symptoms. — This exhibits itself by an extraordinary dila- 

 tion of the pupil, which becomes immovable, and has a 

 bright glassy appearance. This is caused by a paralysis of 

 the optic nerve, or the surface of the retina, (or mirror of 

 the eye,) occasioned by a determination of blood to the brain, 



