title: The effect of hyperosmolarity on tear mucus ferning.
mesh_terms: D000328:Adult; D000368:Aged; D006801:Humans; D007637:Keratoconjunctivitis / Q000175:diagnosis*; D007638:Keratoconjunctivitis Sicca / Q000175:diagnosis*; D008875:Middle Aged; D009093:Mucus / Q000032:analysis*; D009994:Osmolar Concentration; D013666:Tears / Q000032:analysis*