| 摘要 |
PURPOSE: An electronic color-blindness test device is provided to improve user convenience and test accuracy because test colors and numbers can be changed according to needs. CONSTITUTION: A main body(100) comprises LEDs(110), a battery(120), and a charging condenser(130) and displays numbers on a screen thereof. A number pad(200) is powered by a power supply using 220V connected to the main body. A key pad(210) uses the same touch technology as a computer keyboard. When a number is pressed through the key pad, the corresponding number is displayed on the screen.
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