Built-in Demisting Feature on Spetacle Frame to Solve fogging Lens Problem

Abstract

Spectacle lens get foggy due to water condenstation when there is a change in temperature. This is a common experience shared by all spectacle user with no anti-fog coating on their lenses. This problem is most obvious in raining days when the user step out of a cold shopping mall, the bus or car with a temperature of around 20 degress, about 60 percent relative humidity, when the outside wind blow warmer air with relative humidity of between 87 to 99 percent to the cold lens surface, condensation occurs.