Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Reexamination Certificate
2006-07-11
2006-07-11
Winakur, Eric F. (Department: 3735)
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
Reexamination Certificate
active
07073907
ABSTRACT:
An optometric apparatus for subjectively examining visual functions of an eye (PE) of an examinee is disclosed. This apparatus includes: a disposing unit (2) for disposing an optical element (4) in front of the examinee's eye; a cornea position alignment optical system (20) for checking a vertex distance between a back surface of the disposed optical element and a corneal vertex of the examinee's eye; wherein the alignment optical system includes an aligning scale plate (23) provided with a scale (S1–S5) for checking the vertex distance, a reticle plate (24) provided with a reticle (24a) and placed in a different place from the aligning scale plate, and a first reference mark (30) and a second reference mark (31) for positioning an eye (OE) of an examiner in a point at a predetermined distance from the reticle plate, the first and second reference marks being provided in different places and appearing, to the examiner's eye, to have a predetermined positional relation with each other when the examiner's eye is positioned in the point at the predetermined distance from the reticle plate.
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Nidek Co. Ltd.
Shih Theodore
Winakur Eric F.
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