Can You See All the Numbers in These Plates?
View Ishihara-style dot plates and identify the hidden numbers. This screening checks for red-green and blue-yellow color vision deficiency — all rendered locally via Canvas.
This screening displays Ishihara-style dot plates with hidden numbers to test for three types of color vision deficiency: protanopia (red), deuteranopia (green), and tritanopia (blue-yellow).
Red-green color vision deficiency affects approximately 8% of males and 0.5% of females worldwide, making it the most common inherited visual condition.
Plate 1 / 6
Type the number you see in the circle above.
What Do Your Results Mean?
| Result | Range | Meaning |
|---|---|---|
| Good | All plate numbers correctly identified | Your color vision appears normal across red-green and blue-yellow axes. No color vision deficiency detected in this screening. |
| Warning | 1-2 plates missed or incorrectly identified | Mild color vision deficiency is possible, or your monitor calibration may have affected results. Retest on a calibrated display and consult an eye care professional for confirmation. |
| Bad | 3+ plates missed in the same deficiency category | Strong indication of color vision deficiency in that category. Consult a licensed eye care professional for a standardized Ishihara or Farnsworth-Munsell test to confirm the diagnosis. |
Common Issues and How to Fix Them
Cannot see any numbers in the plates
Check your monitor brightness and disable any blue light filter or night mode. View the screen straight-on (not at an angle) in a well-lit room. If numbers remain invisible, this may indicate significant color vision deficiency.
Results differ between devices (phone vs monitor)
Different displays have different color accuracy and gamut coverage. Use a calibrated monitor at standard brightness for the most reliable screening. OLED and IPS panels generally produce more accurate results than TN panels.