We're going to have to come up with new tags for this, because there are several kinds of visors that don't have tags. I see at least:
- Full-face helmets with built-in eye visors, like the kind worn by Samus Aran, Master Chief, or Doomguy.
- Robots and mecha with helmet visors like the above, except they're extremely common in mecha and would flood the tag if they used the same tag as for people.
- Visor sunglasses (post #4635399).
- Various scifi eye visors that are somewhere in between glasses and head-mounted displays.