Optical illusions

What happens when you stare at the white spot in the grid?

• The spot becomes larger.

• The spot turns black.

• The surrounding spots appear grey.

• The grid disappears.

Why do the muffin cups appear inverted?

• The cups are actually inverted.

• The brain assumes light comes from above.

• The pan is defective.

• The pan is spinning.

How do retinal ganglion cells contribute to optical illusions?

• They make images blurry.

• They increase contrast with lateral inhibition.

• They focus on moving objects.

• They enhance color perception.

What causes the confusion in the upside-down Lincoln face?

• The face is blurry.

• The eyes and mouth are right side up.

• The image is too dark.

• The face is too small.

Why does the brain make assumptions about visual information?

• To create random images.

• To slow down processing.

• To make images colorful.

• To save cognitive energy.