Visual target display device, visual target presentation method, and storage medium

A visual target presentation method comprising:

• presenting a visual target, of a chromatic color, for testing a color-related visual function of a subject and a background around the visual target in such a way that a brightness of the background is a numerical value between a numerical value 10% less than a brightness of the visual target and a numerical value 10% greater than the brightness of the visual target and a combination of a color of the visual target and a color of the background is a combination of colors which are in a relationship of confusion colors in dichromatism;
• and
• obtaining a threshold value, which is a size of the visual target based on which a determination on whether or not the subject is able to perceive the visual target is made, by changing a size of the visual target presented to the subject while maintaining the combination of the color of the visual target and the color of the background.

A computer-readable storage medium having stored therein a program for causing a computer to function as display control means configured to cause a display section to display a visual target, of a chromatic color, for testing a color-related visual function of a subject and a background around the visual target in such a way that a brightness of the background is a numerical value between a numerical value 10% less than a brightness of the visual target and a numerical value 10% greater than the brightness of the visual target and a combination of a color of the visual target and a color of the background is a combination of colors which are in a relationship of confusion colors in dichromatism, wherein

• the display control means changes a size of the visual target while maintaining the combination of the color of the visual target and the color of the background, so as to obtain a threshold value which is a size of the visual target based on which a determination on whether or not the subject is able to perceive the visual target is made.