If you wear eyeglasses, I’ll bet you’ve encountered a most annoying problem while wearing a mask—glasses fogging up. That makes it difficult, if not impossible, to see! Why do our eyeglasses fog up when wearing a mask? The answer is simple: condensation. According to ophthalmologist Dr. Jesse Pelletier, recently quoted in Parade, “When the warm and moist air is trapped behind your spectacles, microscopic water droplets collect on the cool surface of the lens, forming a layer of fog that makes it difficult to see.” Well, great. Now we know the reason, but so what if we don’t have a solution, right? Because I deal with the problem myself, I was super excited to reach into my virtual mailbag to find this message for how to stop glasses from fogging up: Good Ol’ Barbasol Dear Mary: Since wearing masks has become a part of life, fogging glasses are a problem …