506 DISEASES OF THE EYELIDS 



scissors or a very small scalpel. After the operation is com- 

 pleted all hemorrhage must be controlled and an antiseptic 

 ointment applied under the lids. Yellow oxid of mercury 

 ointment has proved satisfactory for this purpose. It should 

 be applied daily. 



LAGOPHTHALMUS. 



Definition. —An incomplete closure of the eyelids in which 

 a portion of the cornea is left exposed. When the cornea or 

 conjunctiva is left continuously exposed to the air without 

 the normal secretions covering them, they become irritated, 

 inflamed and serious alterations take place. The membranes 

 are thickened, the cornea opaque and dry, and may even 

 become perforated. The tears follow the angle of the eyelids 

 and flow down over the face. The condition is brought about 

 in most cases by ectropion, exophthalmos, enlargement of the 

 eyeball, and some few cases by paralysis of the orbicularis 

 nerve. Wounds of the lids with extensive loss of substance 

 may also produce it. 



Treatment.— The first indication is to remove the cause, 

 if possible. If this cannot be done the only thing left is to 

 protect the conjunctiva and cornea from dessication and 

 eventual destruction. Oily solutions are best for this purpose. 

 Instill them into the eye once or twice daily. 



TUMORS OF THE EYELIDS. 



Several varieties of tumors are found on the eyelids of 

 small animals. 



Papillomata. — Warts. — These are not uncommon in dogs 

 and birds. The wart-like excrescences found in birds, par- 

 ticularly parrots, are usually tubercular, and are often asso- 

 ciated with degenerations and abscess formation. In old 

 dogs and cats, horn-like growths are found as outgrowths 

 from the walls of Meibomian cysts. Small warts are also 

 seen developing along the margin of theTid, or on the skin 

 over the eyelid. During the course of epitheliosis of birds 

 small horn-like growths appear on the lids. 



Treatment.— Small warts appearing on the margin of the 

 lids, or skin, are removed with the scissors. Cauterize the 



