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Fiberscopic observation of canaliculi after punctal plug extrusion.

Punctal plug therapy is effective in treating severe aqueous-deficient dry eye. However, the formation of granulation tissue within the canaliculus sometimes causes plug extrusion. When this occurs, it is essential to evaluate the extent of the canalicular obstruction by granulation tissue before considering subsequent therapies, including insertion of a replacement plug or surgical occlusion of the punctum. Currently, there is no appropriate method for evaluating the degree of canalicular blockage after punctal plug extrusion. In the present study, we evaluated the effectiveness of a fiberscope system in the examination of canaliculi interiors in patients with extruded punctal plugs.