US Patent 7134998 Tear secretion quantity examination system
Patent 7134998 was granted and assigned to Kao Corporation on November, 2006 by the United States Patent and Trademark Office.
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A tear secretion quantity examination system for evaluating simply and non-invasively the tear secretion quantity has: a moisture evaporation quantity detection unit for detecting the moisture evaporation quantity from a subject's eye with a humidity sensor; and an operation unit for computing evaluation parameters of the tear secretion quantity based on a detection signal of the moisture evaporation quantity detection unit. The operation means approximates an attenuation portion of saw-tooth responses appearing for each blink in a tear evaporation profile in which the detection value obtained with the humidity sensor is plotted against the time.
US Patent 07134998 Tear secretion quantity examination system US Patent 7134998 Tear secretion quantity examination system
US Patent 07134998 Tear secretion quantity examination system
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