This is strange: scientists have discovered that a sudden noise can cause what to happen to your body?

That's right: even the smallest noises can cause your pupils to suddenly dilate. This is why it can be hardest to concentrate on delicate or detailed work when there are noises around. It's partially that your brain is reacting to the noise, but it's also because your eyes are dilating, which makes it harder to concentrate.

Asked by Tom Cohen · Last updated 5 years ago · 48K views