CHAPTER IV. 



EXCRETORY APPARATUS. 



Excretory Apparatus (Diseases of). — As a result of in- 

 flammations ; of the conjunctiva and lids ; wounds of 

 the lid ; narrowing and stoppage of. the canaliculus ; 

 may have watering of the eye {Epiphora). If ob- 

 struction of the canaliculus, slitting the canal with a 

 knife modeled by and bearing the name of Agnew is 

 the treatment. This is a narrow-bladed, probe-pointed 



AgueWs Canaliculus Knife 

 Fig. 34. 



knife. Enter the puncta with its probe point, verti- 

 cally. Remember the anatomical disposition of the 

 canaliculus in the angle of the lid and follow it. The 

 idea is to open the already existing, but obstructed 

 passage, and not to establish a new one. When entered 

 vertically, — and that takes patience, but the sphincter 

 will yield to persevering pressure — depress the handle 

 of the knife until it is horizontal. Push inward until 

 you reach the inner wall, keeping the lid on the 



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