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To the Editor:
—During the past few months following the publication of my article, "Chronic Tearing Cured by Reestablishment of Normal Tear Conduction Passages," in the December 1947 issue of the Archives, page 775, I have received a number of requests for more detailed information on the use of indwelling horsehair in maintaining the patency of the newly formed punctum and lower canaliculus. Most of these questions are concerned with what precaution need be taken so that the free end of the horsehair at the punctum does not damage the cornea by scratching or by irritating the globe.I believe it worth while to publish the method that I have been using to obviate this danger since I submitted my article in October 1946.Should the punctum, as well as the lower canaliculus, be closed by scar tissue, I proceed as follows: The point selected for starting the perforation into