Comparison of osmolarity of various artificial tears products commercially available in South Korea

In Ho Woo, Jun Gi Hong, Jung Ah Huh, Youngsub Eom, Hyo Myung Kim, Jong Suk Song

Research output: Contribution to journalArticlepeer-review


Purpose: To compare the osmolarity of various artificial tear products commercially available in the Republic of Korea. Methods: The osmolarity of the artificial tears was analyzed using TearLab® and Multi-Osmette™. We divided the artificial tear products into five groups, including hypo-osmolar 0.18% sodium hyaluronate (HA), iso-osmolar 0.1%, 0.15%, 0.3% HA, and 0.5% carboxymethylcellulose sodium (CMC), and measured three products per group. Results: Among the 12 products of iso-osmolar artificial tears, there were seven products (58.3%) < 300 mOsm/L, and among the three products of hypo-osmolar artificial tears, there were two products (66.6%) < 150 mOsm/L. A significant difference (p < 0.05) was observed between the iso-osmolar 0.3% HA group and the hypo-osmolar 0.18% HA group. In the iso-osmolar 0.1% HA and 0.15% HA, the difference between the products in each group was approximately 12 mOsm/L, and the CMC group had the smallest deviation among products, which was close to 300 mOsm/L. There was a significant difference of 305.57 ± 6.38 mOsm/L in the iso-osmolar 0.15% HA group, 293.44 ± 8.71 mOsm/L in the 0.1% HA group, and 285.67 ± 3.67 mOsm/L in the 0.3% HA group (p < 0.001). There was no significant difference in osmolarity between the iso-osmolar products containing HA and CMC (p = 0.117). Conclusions: There was a difference in osmolarity between the published and actual measured values of commercial artificial tears, and there was a difference in osmolality depending on the content of HA and the manufacturer.

Original languageEnglish
Pages (from-to)117-122
Number of pages6
JournalJournal of Korean Ophthalmological Society
Issue number2
Publication statusPublished - 2018 Feb


  • Artificial tears
  • Dry eye
  • Osmolarity
  • TearLab®

ASJC Scopus subject areas

  • Ophthalmology

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