CANCER OF THE EYE 23 



becomes necrotic, assumes a blackish-gray color and 

 constantly exudes serum, pus and shreds of tissue. 



If the disease is not checked the growth continues 

 to increase in size, crowding the eye-ball deep into the 

 orbit. Nothing of the eye itself can be seen; the entire 

 orbital cavity is filled with the new growth, the lids 

 and orbital conjunctiva developing additional new 

 growths. 



Finally the lymphatics in the region break down, 

 forming enlargements on the side of the head and 

 parotid region that open and discharge purulent mat- 

 ter. The animal becomes cachectic and finally dies. 



Treatment of cancer of the eye is not very satis- 

 factory. If the eye is to be saved the case must be 

 submitted to treatment as soon as possible after the 

 first layer of granular tissue forms. If the veterinarian 

 is able to begin the treatment in this stage he can 

 promise his client fairly good results. 



To handle the condition satisfactorily, even at this 

 stage, it is usually necessary to cast the cow and pro- 

 duce profound anesthesia, without which all attempts 

 at worthy treatment are usually converted into bungle- 

 some interference. We make this statement with due 

 consideration, following personal experience. 



When the cow has been chloroformed the orbital 

 cavity is to be copiously irrigated with a very mild 

 bichlorid or chinosol solution. With an eye speculum 

 holding the lids apart the layer of cells is very care- 

 fully shaved off, care being taken not to injure the 

 healthy face of the cornea. 



In this early stage it will be seen that the layer of 

 granulation tissue is underlaid with a thin ])and of 

 white connective tissue. This band is apparently the 

 foundation of the growth; it is very intimately con- 

 nected to the surface of the cornea. When the soft 



