"The most frequent indication is epiphora: excessive tearing or watering of the eye(s) 3. DCG is mainly to locate the site of obstruction in the lacrimal drainage system, to differentiate canalicular from proximal sac obstruction, and detect the presence of stenotic segments that cannot be passed by a cannula 4."
"dilate the lacrimal punctum to insert the cannula. The cannula should be sited inside the canaliculus, near the punctal opening, so proximal obstruction can be seen if any 6."
"post-removal of cannula an erect view may be useful in diagnosing functional blocks"
"similar projection to an OM view in most cases"
Expected headings
"Indications"
"Types"
"There are several ways of performing a DCG 4:"