234 Diseases of the Eyes and Ears, 



disease may originate in the anterior chamber, but as a 

 rule both eventually suffer. 



Treatment consists of draining off the fluid by means 

 of the trocar and cannula, at various intervals, followed 

 by the application of cold water, or astringent and 

 evaporating lotions. 



Distension of the Eyeball from extravasation of 

 blood and serous effusion as the result of direct injury, 

 was successfully treated by Blaine, evacuation being 

 secured by means of a couching needle. He proposed 

 to consider such states as irawnatic dropsy. 



Dislocation of the Eyeball is common to small 

 animals having large and prominent organs, being caused 

 by injuries from other dogs in combat, or by the claws 

 of a cat. 



Treatment is by operation, which must be performed 

 by the practised canine surgeon. 



Tumour and Enlargement of the Haw, or Car- 

 tilage Nictitans. — The formation of tumour may find 

 attachment to the substance of the cartilage, interfering 

 greatly with vision, and producing a copious flow of tears 

 known as watery eye. They are caused by various forms 

 of irritation, and are also congenital. Removal by knife 

 or scissors is the only effectual plan. 



Enlargement is caused by cold, injuries, irritation, 

 &c., or it may be congenital, inducing pain, becoming 

 acutely inflamed, and producing abundant lachrymation. 

 Treatment consists of scarifications to the membrane, 

 followed by hot fomentations, or the spongio-piline 

 poultice, aided by a laxative internally. Subsequently, 

 astringent lotions to the affected parts. Complete ampu- 

 tation may be called for. 



Dermatoid Conjunctiva. — This is usually a con- 

 genital defect. A portion of the conjunctival membrane 

 covering the eyeball is thickened, and organised similar 

 to the skin, bearing a tuft of strong hairs. Early atten- 

 tion is called to the defect by a profuse lachrymation and 

 inconvenience, amounting to opacity of the eyeball with 

 absolute loss of vision. The tuft, together with the 



