One of the few legitimate complaints about the requirements to wear face masks is their tendency to fog the lenses of glasses-wearers. There seems to be no way to avoid this with a surgical-style mask (principally designed to protect those in the vicinity of the wearer). Some humid air can even seep out of a properly-fitted respirator (principally designed to protect the wearer), which leaves no visible gaps along its edges, if you exhale strongly. But one person's nuisance is another's marketing opportunity. I snapped the attached cellphoto this afternoon in the waiting room of a large ophthalmology practice near Washington, D.C.
