| 摘要 |
A device, method, system and medium are provided for exercising an observer's eyes. The device includes a housing (123) with colored light sources (120) of at least two different colors in a substantially linear alignment, including a first color which causes the eye to increase its focusing power to gain a sharp image of the first color, and a second color which causes the eye to decrease the focusing power to gain a sharp image of the second color. Alternatively, the device may include an display (251) controlled by a computer processor having associated computer memory, the processor operatively coupled to the display (251), the computer memory, and one or more input devices, the computer processor being configured to display on the display device (251) computer-generated renderings of the colored light sources.
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