As we put on face masks due to the COVID-19 safety measures, those who wear glasses are more often than not finding themselves dealing with fogged up lenses. Well, this is not a new problem really as goggle-wearing skiers and bespectacled surgeons have long been experiencing it.
When putting on a mask, your eyeglasses may fog up because the warm and moist air you exhale is being directed up to your glasses. One way to stop this from happening is to ensure you block your breath from reaching the surfaces of your lenses.