| http://www.w3.org/ns/prov#value | - The sonic resonators can be made responsive to changes in temperature and voltage which correlate to the presence and level of molecules such as glucose and ions in the tear film. [0106] Ocular and systemic disorders may cause a change in the pH, osmolarity, and temperature of the tear film or surface of the eye as well as change in the tear film concentration of substances such as acid-lactic, gl
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