I never leave home without my glasses on my face - they're not "optional" for me like they are for some people - but sometimes I'll do without them if I'm just bumming around the apartment. And I've noticed that when I'm walking around with a naked face, the "wind" of me moving around hurts my eyes and makes me blink. It's like I can feel the individual air molecules bouncing off my exposed eyeballs.
But I don't notice non-spectacled people flinching and blinking as they walk around. They don't seem to feel anything amiss.
My hypothesis is that a lifetime of constant air molecule collisions has given them eye-calluses.