Tear secretion quantity examination system

Details Tear secretion quantity examination system Tear secretion quantity examination system

2006-11-14

2006-11-14

Nasser, Robert L. (Department: 3735)

Surgery

Diagnostic testing

Determining rate of fluid loss from body surface

C600S300000

Reexamination Certificate

active

07134998

ABSTRACT:
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.

REFERENCES:
patent: 4461303 (1984-07-01), Refojo et al.
patent: 6210000 (2001-04-01), Yee
patent: 2001-46339 (2001-02-01), None
Masakazu Yamada, et al., “Diagnosis and Treatment of Dry Eye Syndrome from the Standpoint of Tear Evaporation”, Journal of the Eye, vol. 7, No. 3, Mar. 30, 1990, pp. 365-370, and p. 476.

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