Patent ID: 8087781
Filing Date: 2012-01-03
Classification: A61B

Abstract:
1. An optotype presenting apparatus comprising: a color display comprising a number of arranged pixels comprising red, green, and blue filters; a first memory which stores data on a plurality of test charts including a visual acuity test chart and a red-green binocular visual performance test chart, wherein the binocular visual performance test chart includes a black background or a white background, a red optotype, and a green optotype and is used in a binocular visual performance test performed with a red filter placed in front of one of eyes of an examinee and a green filter placed in front of the other eye; a test chart selecting unit which selects from the test charts stored in the first memory a test chart to be displayed on the display; a color adjusting unit which varies and adjusts respective luminance levels of red, green, and blue components of at least one of the red optotype and the green optotype; a second memory which stores a plurality of pieces of luminance information which is adjusted with respect to at least one of the red optotype and the green optotype; a color selecting unit which selects one of the plurality of pieces of luminance information stored in the second memory when the binocular visual performance test chart is selected; and a display control unit which controls the display to display the selected test chart and controls, when the binocular visual performance test chart is selected, the display to display the red optotype and the green optotype comprising an optotype adjusted based on the selected piece of luminance information together with the black background or the white background.