| 摘要 |
<p>An eye test chart (2) is a chart for eye tests, which is made up of multiple visual targets composed of patterns of combinations of at least two or more kinds of colors and arranged at predetermined positions corresponding to visual field regions to be examined in a bilaterally symmetric pattern. On the eye test chart, grid targets (3), which are composed of a grid (32) of squares arranged in a grid pattern (31) in parallel in both the longitudinal and transverse directions, with circular targets (4) arranged inside the squares of the grid, and which form the shape of a robot as a whole, are arranged in a central portion. A fixed target (41) is placed at the center of the grid targets (3). Each of the circular targets (4) has a vertical striped pattern formed with two colors complementary to each other in such a manner that one color shifts to the other in a sinusoidal fashion. Band-shaped targets (5) formed in the shape of a band with a checkered pattern of multiple striped squares are arranged around the grid targets (3). Blind-spot targets (6) for determining Mariotte's blind spot are arranged on both right and left sides of the band-shaped targets, and blind-spot peripheral targets (62) are arranged around the blind-spot targets. Further, on the eye test chart (2), parallel targets (7) formed in parallel from parallel square targets (72) and parallel circular targets (71), each composed of a hollow figure shaped like a Chinese character " Ð " or a number "0", are arranged on top and bottom sides and right and left sides, and large-sized square targets (8), composed of large figures in which two figures are arranged close to each other, are arranged on the four corners. The use of the eye test chart (2) formed such that multiple kinds of visual targets are arranged at predetermined positions corresponding to visual field regions to be examined makes it possible to simultaneously and easily carry out eye tests on visual field defects, metamorphopsia, color defective vision, etc., which have been conventionally carried out using large-scale test apparatuses requiring a lot of time and trouble. <IMAGE></p> |
