AIM: To investigate the positional relationship between the nasal ends of the lacerated lacrimal canaliculi, lacrimal caruncle, and medial canthal ligament, as well as its application in the lacrimal canalicular anastomosis.

METHODS: Sixty-five patients with traumatic lower canalicular laceration were selected. The distance from the lacrimal punctum to the temporal end was measured. The nasal ends were found under direct vision, and the positional relationship between the nasal ends, lacrimal caruncle and medial canthal ligament were quantitatively analyzed.

RESULTS: Totally 65 patients with canaliculus laceration, 39 patients had a distance of less than 6mm from the lacrimal punctum to the temporal end, where the nasal ends of 35 patients were located in the lacrimal caruncle area. There were 26 cases in which the distance from the lacrimal punctum to the temporal end was greater than 6mm, where the nasal ends of 24 cases were located in the medial canthal ligament area. The vertical distance between the nasal ends in the lacrimal caruncle area and the lacrimal mucosa was 2.1±0.7mm, and the vertical distance between the nasal ends in the medial canthal ligament area and the skin edge was 3.5±1.2mm.

CONCLUSION: The positions of nasal ends can be divided into the lacrimal caruncle area and the medial canthal ligament area, providing a basis for finding the nasal ends of the lacerated lacrimal canaliculi in the clinical practice.