Test strip for measuring tear production

Details Test strip for measuring tear production Test strip for measuring tear production

1992-02-27

1992-12-15

Shay, Randy C.

Surgery

Truss

Pad

128760, 128897, A61B 1300

Patent

active

051707993

ABSTRACT:
Disclosed is a test strip for measuring tear production. The test strip comprises a generally flat sheet material having one end rounded to be semi-circular shaped and being printed with a folding line along which said strip is bent prior to the measurement operation. The test strip is further printed with graduation marks and a scale for indicating the amount of absorbed tear. In a preferred embodiment, provided at either one or both corners of the end opposite to the rounded end is a mark indicating that the particular test strip is used for measuring one of either the left or right eye. The sheet material is preferably made of filter paper. The test strip has no notched portion which would weaken the sheet material and yet may be folded precisely along the fold line prior to use. The graduation marks and scales printed on the test strip enable easy measurement of the length of the portion wetted by tear fluid.

REFERENCES:
patent: 1870655 (1932-08-01), Schur
patent: 3776742 (1973-12-01), Sanders
patent: 3905935 (1975-09-01), Irwin et al.

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