Correct usage would be to wear glasses with the mask, not breathing in the virus but having it exposed to the eyes is going to result in an infection.    The mask isnt perfect but it mitigates the risk, the reason people say its false assurance is because only really creating a distance and having no contact can stop the spread of this.   Mask maybe cuts the % risk in half but you are still inhaling air from around you, the only proper masks I've seen used are in hospitals and they have to throw them away after some hours as the filter wears out.   Use of that medical grade mask also goes with a clear visor or glasses.    Thats relevant to poker I guess because you got more then enough excuses now to wear shades playing poker or any glasses you like, not that I ever thought an excuse was needed and I always saw pro players doing that anyhow.