Color Blind Test - Ishihara Test Online Free
Test your color vision with 12 Ishihara-style plates generated in your browser. Identify hidden numbers to screen for color blindness.
์ด์ํ๋ผ ์๋งน ๊ฒ์ฌ
์ด ๊ฒ์ฌ๋ ์ด์ํ๋ผ ๋ฐฉ์์ ์ ํจํด ๋ํ์ ์ฌ์ฉํ์ฌ ์๊ฐ ์ด์์ ํ์ธํฉ๋๋ค. 12๊ฐ์ ๋ํ์ด ํ์๋๋ฉฐ, ๊ฐ ๋ํ์ ์จ๊ฒจ์ง ์ซ์๋ฅผ ์ฐพ์์ฃผ์ธ์.
What Is a Color Blind Test?
A color blind test screens for color vision deficiency (CVD) โ the inability to distinguish certain colors. This tool uses Ishihara-style plates: circles filled with colored dots where a number is hidden in a contrasting color. People with normal color vision can easily see the number, while those with color vision deficiency may struggle. Our test generates plates using HTML Canvas, covering both red-green and blue-yellow deficiency types.
How to Take the Color Blind Test
- Click "Start Test" to begin the 12-plate screening
- Look at each plate โ a circle filled with colored dots with a hidden number
- Select the number you see from the choices, or tap "Nothing" if you can't see one
- Complete all 12 plates โ the progress bar shows your advancement
- View your results โ see your score and which type of deficiency (if any) was detected
Why Use This Color Blind Test?
- Quick Screening โ Complete the test in under 2 minutes
- No Copyright Issues โ All plates are generated with Canvas, not copied from medical charts
- Multiple Types โ Screens for red-green (protanopia/deuteranopia) and blue-yellow (tritanopia)
- Detailed Results โ See plate-by-plate breakdown of correct and incorrect answers
- Privacy โ Runs entirely in your browser with zero data collection
- Free & Unlimited โ Retake as many times as you want
FreeToolbox vs Other Color Blind Tests
| Feature | FreeToolbox | EnChroma | Colorlitelens |
|---|---|---|---|
| Plate Count | 12 | 9 | 14 |
| Canvas Generated | Yes | No | No |
| Red-Green Test | Yes | Yes | Yes |
| Blue-Yellow Test | Yes | No | Yes |
| Detailed Breakdown | Yes | Basic | Yes |
| No Sign-up | Yes | Yes | Yes |
| Privacy | Browser-only | Server | Server |
FAQ
Is this a medical diagnosis?
No. This is a screening tool only. For a definitive diagnosis, please consult an eye care professional (ophthalmologist or optometrist) who can perform standardized Ishihara or Farnsworth tests.
What types of color blindness does this detect?
This test screens for red-green color vision deficiency (the most common type, affecting ~8% of males) and blue-yellow deficiency (tritanopia, which is much rarer).
Why do you generate plates instead of using real Ishihara plates?
The original Ishihara plates are copyrighted medical materials. Our Canvas-generated plates use the same principle (dots with hidden numbers) but are original creations that avoid copyright issues.
Can screen settings affect the results?
Yes. Screen brightness, color calibration, blue light filters, and night mode can all affect how colors appear. For best results, use a well-calibrated screen at normal brightness with no color filters.
How common is color blindness?
About 8% of males and 0.5% of females of Northern European descent have red-green color blindness. Blue-yellow deficiency affects less than 1 in 10,000 people.