Patent ID: 7568801

Claim:
An optotype presenting apparatus which presents an optotype and a test chart used for testing visual performance, the apparatus comprising: a display; a polarization optical member placed in front of the display, which includes first optical regions and second optical regions which are alternately arranged in either one of a linear pattern and a grid pattern based on the size of pixels of the display, the first optical regions changing light exiting from the display into light having a polarizing axis, the second optical regions changing light exiting from the display into light having a polarizing axis, the polarizing axes being perpendicular to each other; a selector which comprises a switch with which a test chart for a binocular visual test including a polarization red-green test chart is selected; a region where an optotype for a left eye is to be presented and a region where an optotype for a right eye is to be presented, the regions being provided on a display surface of the display; and a controller which controls display of the display, wherein, when the polarization red-green test chart is selected with the selector, the controller controls the display to display a polarization red-green optotype for a left eye in pixel regions which correspond to the first optical regions and are within the region where the optotype for the left eye is to be presented, and controls the display to display pixel regions in white which correspond to the second optical regions and are within the region where the optotype for the left eye is to be presented, while the controller controls the display to display a polarization red-green optotype for a right eye in pixel regions which correspond to the second optical regions and are within the region where the optotype for the right eye is to be presented, and controls the display to display pixel regions in white which correspond to the first optical regions and are within the region where the optotype for the right eye is to be presented.