Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1994-01-31
1995-02-07
Sikes, William L.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
340573, A61B 314
Patent
active
053879520
ABSTRACT:
A feedback apparatus for physical examinations, particularly for optical devices used to examine the eyes, provides an examinee with a signal that tells the examinee whether or not he or she is maintaining the proper examination position. A headrest has a pressure or proximity sensitive sensor for enabling and disabling an annunciator producing a signal such as light or sound. In an optical viewer, the signal can be provided by controlled operation of a point light source on which the examinee is expected to focus. The switch can be a membrane switch mounted on a forehead stop. The examinee can perceive whether his or her head is positioned in the proper examination position. Moreover, when used as a fixation point, the examinee's attention remains fixed on the annunciation signal. The examinee (patient) need not be reminded by the physician to move back into place if the examinee inadvertently withdraws from positive pressure against the headrest.
REFERENCES:
patent: 2063015 (1936-12-01), Ames, Jr.
patent: 2235319 (1941-03-01), Jobe
patent: 2267103 (1941-12-01), Ireland
patent: 2852975 (1958-09-01), Radde
patent: 3614763 (1971-10-01), Yannuzzi
patent: 3622233 (1971-11-01), Blood et al.
patent: 3706304 (1972-12-01), Sisler
patent: 3777738 (1973-12-01), Sugita et al.
patent: 3904280 (1975-09-01), Tate, Jr.
patent: 3969020 (1976-07-01), Lynn et al.
patent: 4105302 (1978-08-01), Tate, Jr.
patent: 4255022 (1981-03-01), Kuether et al.
patent: 4357079 (1982-11-01), Karasawa
patent: 4444476 (1984-04-01), Simon et al.
patent: 4453808 (1984-06-01), Takahashi et al.
patent: 4468104 (1984-08-01), Nunokawa
patent: 4818097 (1989-04-01), Linde
patent: 4874236 (1989-10-01), Abraham
patent: 5035500 (1991-07-01), Rorabaugh et al.
Mai Huy
Sikes William L.
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