Are there fog resistant scuba diving masks?

Answer 1

There are no fog-proof lenses available. I assume plastic lenses might be slightly less likely due to fog compared to glass, considering that plastic is much less thermally conductive. However, I have heard that plastic lenses still fog up. The colder the water is, the more likely it is that water will condense on the inside of the lens. The best way to prevent fogging is to apply spit or a commercially available anti-fog agent to the inside of the mask lens and rinsing just prior to diving. I dive in cold water (50f) all the time and don't have problems with fogging when I use anti-fog.