Not exactly.
But I have a mask which prevents this. There is kind of an opening on it with a filter so the mask does not collapse and all... I can't explain but yeah they exist
By ensuring a gap at the bottom of a mask you can prevent this. Using a longer cloth like a bandana or facial covering common to motorcycles and snow sports, one that “ticks in” to a short cover motivates whatever loss of “protection” to self and others one might feel a gap at the bottom of the mask gives*
*but since most people aren’t wearing masks that are rated to offer any actual protection to self or others- often many “cheaper” masks or home made ones are being made of materials with weaves porous enough to make them essentially non effective against anything short of throwing a spit ball- we are mostly operating on the principal of “something is better than nothing” so you may as well leave a small gap at the lower portion of the mask at that point.
2 other solutions are:
1. Wadding yo a small absorbing cloth or some tissue between your mouth/nostrils and the top of the mask can absorb moisture being expelled, as can sewing in or fabricating a pouch to hold desiccant and using it.
2. Plenty of anti fog coatings exist and are widely used in motorsports and other places where optics must be clear. Sprays or liquids generally wiped on with microfiber cloth. Make sure you use one formulated for the material of your glasses- some anti fog coatings at made specifically for glass and others for polymer- and sometimes the wrong type can make things worse or even ruin optics of the wrong materials.
A small drop of dish soap, or rubbing a cut potato on the lens can work to. Several other “home anti fog” solutions exist too- most simply use something with some natural oils which form a thin coating that water doesn’t adhere to and will not form globs. “RainX” is a commercial brand of anti fog found almost everywhere.
If your glasses fog up your mask isn't maintaining a proper seal. Taping on an aluminum paper brad or in a pinch a bread tie can help, that or using medical tape to secure the mask to your face if you are using single use masks. Just make sure to lay a piece of tape down, then the mask, then another piece of tape.
But I have a mask which prevents this. There is kind of an opening on it with a filter so the mask does not collapse and all... I can't explain but yeah they exist
1. Wadding yo a small absorbing cloth or some tissue between your mouth/nostrils and the top of the mask can absorb moisture being expelled, as can sewing in or fabricating a pouch to hold desiccant and using it.
2. Plenty of anti fog coatings exist and are widely used in motorsports and other places where optics must be clear. Sprays or liquids generally wiped on with microfiber cloth. Make sure you use one formulated for the material of your glasses- some anti fog coatings at made specifically for glass and others for polymer- and sometimes the wrong type can make things worse or even ruin optics of the wrong materials.