Non-intrusive tear evaporimeter
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United States of America Patent
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-
Jul 24, 1984
Grant Date -
N/A
app pub date -
Apr 28, 1982
filing date -
Apr 28, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The non-intrusive measurement of preocular tear film evaporation employs a goggle fitted on a subject and connected with apparatus for introducing air of known conditions to a goggle chamber over one eye, apparatus for controlling air movement within the goggle chamber, and apparatus for humidity measurement of the chamber air. A measure of palpebral aperture readily provides the area of the exposed eye surface, for calculating the rate of tear evaporation.
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