Perimeter

Details Perimeter Perimeter

2011-05-17

2011-05-17

Dinh, Jack (Department: 2873)

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

C351S226000

Reexamination Certificate

active

07942528

ABSTRACT:
A perimeter has fixation state judging means for individually judging a fixation state of an examinee in connection with each presented stimulus, and the fixation state judging means individually judges the fixation state whenever the stimulus is presented. Even if defective fixation is judged, retest is conducted on only a point where the stimulus was presented, which was judged to be defective fixation. Then, examiner's burden and examinee's burden can be lightened, the test time can be made shorter and test efficiency can be improved in comparison with a case where the whole test is retried from the first as a conventional way.

REFERENCES:
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patent: 5737060 (1998-04-01), Kasha, Jr.
patent: 5946075 (1999-08-01), Horn
patent: 2004/0057013 (2004-03-01), Cappo et al.
patent: S62-9330 (1987-02-01), None
patent: H4-3213 (1992-01-01), None
patent: 2002-272685 (2002-09-01), None
EP Search Report—Sep. 20, 2009, Kowa Company.

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