Purpose: Analyze the components of dacryoliths, and discuss the importance of composition analysis in the diagnosis and etiology of dacryoliths. Methods: A retrospective analysis was performed for the 9 dacryoliths samples collected by meibomian gland massage and canaliculotomyfrom patients in Beijing Tongren Hospital from October 12, 2022 to August 16, 2024. The chemical composition of the collected samples was analyzed by infrared spectroscopy to investigate the composition of different stones. Results: Among the 9 samples, there were 4 calcium-containing ones and 5 samples of pure protein. 4 samples were mixed ingredients, including Calcium Oxalate + Uric Acid(UA) for 1 sample, Calcium Oxalate + Dahllite for 1 sample, Calcium Oxalate + protein for 1 sample, Calcium Oxalate + Dahllite + calcium bicarbonate for 1 sample. Conclusions: Dacryoliths have different components and can be composed of single or mixed, organic or inorganic components.

Purpose: Analyze the components of dacryoliths, and discuss the importance of composition analysis in the diagnosis and etiology of dacryoliths. Methods: A retrospective analysis was performed for the 9 dacryoliths samples collected by meibomian gland massage and canaliculotomyfrom patients in Beijing Tongren Hospital from October 12, 2022 to August 16, 2024. The chemical composition of the collected samples was analyzed by infrared spectroscopy to investigate the composition of different stones. Results: Among the 9 samples, there were 4 calcium-containing ones and 5 samples of pure protein. 4 samples were mixed ingredients, including Calcium Oxalate + Uric Acid(UA) for 1 sample, Calcium Oxalate + Dahllite for 1 sample, Calcium Oxalate + protein for 1 sample, Calcium Oxalate + Dahllite + calcium bicarbonate for 1 sample. Conclusions: Dacryoliths have different components and can be composed of single or mixed, organic or inorganic components.