Your Eyes Fight For Perception

When your eyes see two different images at once, your brain cannot blend them. Instead, it frantically flips back and forth, choosing to see only one image at a time.

This strange tug-of-war is called binocular rivalry. Because your brain struggles to merge conflicting visual information, it simply suppresses one eye to maintain focus. You might see a flash of red and then a flash of green as your vision cycles rapidly. It proves that what you see is a manufactured construction rather than a perfect recording of the world.