• This article introduces a surgical instrument that facilitates treatment of obstructions of the common canaliculus or the internal canalicular punctum and which can be used with failure of dacryocystorhinostomy secondary to a membrane formation in the area of nasolacrimal anastomosis.
Beyer CK. Lacrimal Trephine. Arch Ophthalmol. 1976;94(12):2155–2156. doi:https://doi.org/10.1001/archopht.1976.03910040815016
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