Anti-fog lenses

When warm, moist air makes contact with cool lenses, the moist air will condense on the lenses, creating the effect of “fogged lenses”. Applying a permanent anti-fog coating for glasses creates a barrier between the moist air and the glasses, preventing condensation. Since anti-fog lenses for glasses can be expensive, it is also possible to use an anti-fog coating for glasses that can be applied at home by using a spray.