40 OPHTHALMOLOGY FOR VETERINARIANS 



solution of carbolic acid in alcohol. This treatment 

 should be repeated as occasion requires, and care should 

 be exercised that none of the solutions get into the eye. 

 The general health of the animal should always be 

 considered. 



Hordeolum, or stye, is a localized infection about 

 a hair-foHicle, resulting in suppuration. A stye may 

 occur independent of blepharitis, though they often 

 occur together. Pain, localized tenderness, and swell- 

 ing are the prominent symptoms. In some cases a pro- 

 found edema of the whole lid occurs. Styes often ap- 

 pear in succession, or two or more may occur at the 

 same time. In the late stage of suppuration they tend 

 to point and rupture of their own accord. 



Treatment. — Much the same treatment as in blephari- 

 tis may be employed. When the stye points it is better 

 to open it with a small sharp-pointed instrument and 

 express the contents. Protect the opening with a little 

 flexible collodion. 



Chalazion. — This is a disease of the meibomian glands, 

 situated in the tarsus, and the result of stoppage of the 

 outlet ducts which open at the inner edge of the Kd, just 

 posterior to the roots of the lashes. It is manifest by a 

 localized tumor in the lid, movable and free from the 

 skin. As the meibomian gland is essentially a sebaceous 

 gland, a chalazion is like a sebaceous cyst in character 

 and is filled with sebaceous matter. It often goes on 

 to suppuration, and may discharge its contents either 



