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Method and apparatus for non-invasive monitoring of blood substances using self-sampled tears

  • US 20030211625A1
  • Filed: 04/01/2003
  • Published: 11/13/2003
  • Est. Priority Date: 04/05/2002
  • Status: Active Grant
First Claim
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1. A method for determining the concentration of a substance in blood, the method comprising:

  • providing a test apparatus having a sample inlet;

    engaging an eye region of a user with the sample inlet to obtain a tear fluid sample;

    processing the tear fluid sample using the test apparatus to determine a tear substance concentration; and

    correlating the determined tear substance concentration with a blood substance concentration.

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