That needs anti-fog lenses. At present, there are two kinds of anti-fog lenses. One is to speed up the disappearance of fog on the lens through hardness, and the other is to absorb the fog on the lens into a whole, which has better and more obvious effect, but the lens is usually not as good as the first one. Then, make a fuss about the mask. You can buy products with LV strips above the mask, and press them according to the nose shape after wearing them, and the effect is good. Now the masks in hospital operating rooms are all of this design.