Patent ID: 8657444

Claim:
A visual function testing device for testing a plurality of visual functions, the visual function testing device comprising: a visual target image presenting unit configured to present a visual target image; a visual target image rendering unit configured to render the visual target image to be presented on the visual target image presenting unit; a visual function test item selecting unit configured to select an item of a visual function test; a visual target image generating unit configured to generate a visual target image corresponding to the item of the visual function test, the item being selected by the visual function test item selecting unit; a viewpoint distance inputting unit configured to input a viewpoint distance which is a distance between the visual target image presenting unit and a viewpoint of an observer; and a visual angle inputting unit configured to input a visual angle which is an angle to be defined by the visual target image and the viewpoint of the observer, wherein, based on the viewpoint distance and the visual angle, the visual target image rendering unit calculates a display size and a display position of a visual target image corresponding to at least one test of a visual acuity test, a visual field test, a stereopsis test, a binocular vision test and an eye position test, the at least one test being selected by the visual function test item selecting unit, and renders the visual target image with the calculated display size at the calculated display position.