Varifocal coronae

 

The optical coronae through steamed-up glasses have been keeping me entertained. This morning I succeeded in photographing the effect of varifocal lenses. I've circled one light and shown what it looks like through different parts of my glasses. The top picture shows the lower part of my glasses being used. This spreads the light out more in the corona. It's the part of the glasses that are designed for reading so should be more convex.