How accurate is this online color blindness test?

This test uses scientifically-designed Ishihara-style plates that can detect common color vision deficiencies including protanopia, deuteranopia, and tritanopia. While highly accurate for screening purposes, it should not replace a professional eye examination. Monitor calibration and lighting conditions can affect results.

What types of color blindness can this test detect?

This test can identify red-green color blindness (protanopia/protanomaly and deuteranopia/deuteranomaly), blue-yellow color blindness (tritanopia/tritanomaly), and provides indicators for complete color blindness (monochromacy). It distinguishes between different types and estimates severity.

How long does the color blindness test take?

The Quick Screening test takes approximately 3 minutes with 12 plates. The Comprehensive Test takes about 10 minutes with 30 plates and provides more detailed diagnostic information about specific deficiency types.

Is this color blindness test free to use?

Yes, this color blindness test is completely free with no registration required. You can take the test as many times as you like, save your results locally, generate shareable links, and download PDF reports at no cost.

Can color blindness be cured?

Most forms of color blindness are genetic and cannot be cured. However, special glasses and contact lenses can help some people with color vision deficiency distinguish colors more easily. Our results page includes practical tips and accommodations for daily life with color vision deficiency.

Free Color Blindness Test - Ishihara-Style Vision Screening

⚕️ Medical Disclaimer

This is a screening tool only and should not be used as a medical diagnosis. Results may vary based on screen calibration, lighting conditions, and display quality. For accurate diagnosis, please consult an eye care professional. This test cannot detect all forms of color vision deficiency.

What is Color Blindness?

Color blindness (color vision deficiency) affects approximately 8% of men and 0.5% of women worldwide. It occurs when the light-sensitive cells in the retina don't respond appropriately to variations in wavelengths of light.

This test uses scientifically-designed patterns similar to the Ishihara test to screen for the most common types of color vision deficiency, including red-green (protanopia/deuteranopia) and blue-yellow (tritanopia) deficiencies.

📋 Choose Your Test

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Quick Screening

Basic screening with essential plates to detect common deficiencies

12 plates • ~3 minutes

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Comprehensive Test

Detailed assessment with diagnostic plates for specific identification

30 plates • ~10 minutes

📖 How to Take This Test

Ensure you're in a well-lit room with your screen at comfortable brightness
Remove any tinted glasses or contact lenses
View each plate from approximately arm's length away
Spend no more than 5 seconds per plate for best results
Enter the number you see, or select "No Number" if you can't see one

📊 Your Test History

No previous tests found. Your results will be saved here.