TED Video of the Week: Beau Lotto: Optical Illusions Show How We See

This week's TED Video of the Week is from Beau Lotto, whose talk is entitled the "Optical Illusions Show How We See." From the TED website:

Beau Lotto's color games puzzle your vision, but they also spotlight what you can't normally see: how your brain works. This fun, first-hand look at your own versatile sense of sight reveals how evolution tints your perception of what's really out there.