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Main steps of conventional End DCR. (A) Bone overlying lacrimal sac has been removed; (B) well exposed lacrimal sac is ready for incision; (C) medial wall of lacrimal sac removed exposing the lumen of the sac and opening of the common canaliculus. The remnant of the medial wall of the sac has been placed opposite the trimmed nasal mucoperiosteal flap.
