I have a relatively mild form of colorblindness, and I can only make out three shapes in total on the testing cards in that photo—one circle in the top left corner of the card on the left, and a triangle and a circle on the left half of the card on the right. Can someone with normal color vision tell me what I'm supposed to see there?

Interestingly, my eyes keep trying to "resolve" another circle in the top right corner of the left card, but then when I actually focus on that part of the image, it disappears again. It's a pretty strange sensation, almost as if I were looking at a particularly tricky optical illusion.

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