Optometric apparatus

Details Optometric apparatus Optometric apparatus

2004-04-30

2008-10-21

Stultz, Jessica T (Department: 2873)

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

C351S229000, C351S233000, C351S234000

Reexamination Certificate

active

07438416

ABSTRACT:
An optometric apparatus for examining refractive power of an examinee's eye subjectively, capable of performing highly-precise examination. The apparatus has a test window through which a presented optotype is seen, a first spherical-power applying unit which applies spherical power to the eye by changing a combination of spherical lenses in the window, a cylindrical-power applying unit which applies cylindrical power to the eye by changing a relative angle of a cylindrical axis of cylindrical lenses in the window, a second spherical-power applying unit including a spherical lens for correction, an instruction unit which instructs examination spherical and cylindrical power, a power-determining unit which determines power applied by the power-applying units so that a difference between the instructed examination power, and resultant spherical and cylindrical power through conversion for a spectacles wearing reference position falls within a predetermined permissible difference, and a control unit which controls driving of the power-applying units.

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Result of Consultation, App. No. 04 010 335.0-1265, Ref. 56NI1341, Oct. 17, 2007 (11 pages).
Japanese Office Action dated Jan. 24, 2007 for corresponding Japanese Application No. 2003-127482.

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