Eyedropper bottles used in this study. (A) Commercially available multi-dose dropper. (B) Commercially available preservative-free multi-dose dropper. (C) Preservative-free multi-dose dropper using air pressure differentials.

Korean J Clin Lab Sci 2024;56:339-48 https://doi.org/10.15324/kjcls.2024.56.4.339

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