Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Subjective type
Reexamination Certificate
2008-06-19
2009-10-27
Mai, Huy K (Department: 2873)
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Subjective type
C351S242000
Reexamination Certificate
active
07607778
ABSTRACT:
An optotype presenting apparatus capable of performing a test with accuracy by minimizing differences in manners an optotype is seen by examinees which result from differences in height of eyes among the examinees comprising a display unit comprising pixels having color filters arranged in a longitudinal direction, a polarization optical member comprising first and second optical regions in the form of a longitudinal line corresponding to the arrangement of the pixels which are alternately arranged in a lateral direction, the regions converting light from the display unit into light having polarizing axes perpendicular to each other, an optotype selecting unit, and a display control unit controlling the pixels corresponding to the first regions to display first optotypes of the optotype to be presented to a right or left eye, and controls the pixels corresponding to the second regions to display second optotypes thereof to be presented to the other eye.
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Mai Huy K
Nidek Co. Ltd.
Oliff & Berridg,e PLC
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