How it works
A grid of tiles where one is a slightly different shade. Tap it. The difference shrinks and the grid grows each level until you can no longer tell the tiles apart.
Reading your result
This tests fine hue discrimination, not color blindness, a clinical Ishihara screen is a different instrument. High scores need good eyes and a decent screen. Your best grades into the Perception domain and feeds your Scoreborn GPA.
Your Scoreborn GPA combines every graded test you take.