Body Lies

The other expression that bugs me is "his pupils were dilated". Well, the iris is what opens or closes, the pupil being the hole the iris protects (see this amazing building in Paris where the amount of light is regulated through metal irises - link in comment). So, in essence, the pupil is static and the iris contracts and dilates. Yet, our speech focuses on the pupil and keeps alive false notions about how the body works. You would think we would have corrected that by now...