ON THE ESSENTIAL OKGANS OF SIGHT. 



753 



FiQ. 546.— Operation of tlie Cataract by Flap Upward. 



Fig. 547.— Kystltome. 



border of the cornea, the lens presently falls out through the in- 

 cision. If it becomes engaged in the wound it can be removed 

 with the forceps or the curette of the kystitome. 



Unless care is taken at this point to avoid making too great a 

 pressure upon the eye, there is danger of the escape of the vitreous 

 humor. The lids are then brought together and a Ught bandage 

 applied, and as in other cases, the animal must be prevented from 

 disturbing the wound by rubbiag or otherwise. 



The linear method consists in making a straight incision on 

 the outside border of the cornea with the knife of Graafe (Fig. 

 548). It is principally employed in cases of soft cataract. 



PlO. 548.— Knife of Graafe. 



