Optotype presenting apparatus

Details Optotype presenting apparatus Optotype presenting apparatus

2008-04-09

2009-08-04

Mai, Huy K (Department: 2873)

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

C351S232000, C351S242000

Reexamination Certificate

active

07568801

ABSTRACT:
An optotype presenting apparatus of a display type with which a polarization red-green test with accuracy can be performed has a display, a polarization optical member including first and second optical regions changing light from the display into light having perpendicular polarizing axes, a selector, regions where optotypes for left and right eyes are to be presented, and a controller, wherein, when a polarization red-green test chart is selected with the selector, the controller controls the display to display a left-eye polarization red-green optotype in pixel regions corresponding to the first regions within the left-optotype-presenting region and display pixel regions in white corresponding to the second regions within the left-optotype-presenting region, while the controller controls to display a right-eye polarization red-green optotype in pixel regions corresponding to the second regions within the right-optotype-presenting region and display pixel regions in white corresponding to the first regions within the right-optotype-presenting region.

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