As a bald-ish dude I have mostly come to terms with my looks, but hair is not just cosmetic. I find that I need to wear a hat constantly, lest I bash my head on

As a bald-ish dude I have mostly come to terms with my looks, but hair is not just cosmetic. I find that I need to wear a hat constantly, lest I bash my head on things I can't see. The early warning that something is approaching the top of my skull is gone along with that hair. Working on anything in close quarters is perilous.