Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Subjective type
Reexamination Certificate
2007-07-03
2007-07-03
Sugarman, Scott J. (Department: 2873)
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Subjective type
C351S239000
Reexamination Certificate
active
10831166
ABSTRACT:
An optometric apparatus comprises: a pair of right and left lens chamber units, each unit including a test window and optical elements to be selectively disposed in the test window; a convergence unit which converges the right and left lens chamber units; an input unit with which a pupillary distance of an examinee is inputted; a calculation unit which determines a convergence angle of the right and left lens chamber units based on a distance for a near vision examination at which a near vision optotype is presented and the inputted pupillary distance, the convergence angle for the inputted pupillary distance longer than a predetermined reference distance being determined such that an optical axis of the optical element is substantially aligned with a visual axis of an examinee's eye, whereas the convergence angle for the inputted papillary distance shorter than the reference distance being determined such that the right and left lens chamber units are converged without coming into contact with each other; and a control unit which controls driving of the convergence unit based on the determined convergence angle.
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Dinh Jack
Nidek Co. Ltd.
Sugarman Scott J.
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