Get a fat O ring of suitable size, and jam inside the rims and up against the outer edge of the lens. Stops lens glass from scratching directly against your (sun)glasses. They all generally work fine without shades including when you don't wear glasses and you get full field of view. Non-problem.
Or play with 3" long piece of racing bicycle inner tube folded back on itself, cut ends together and away from you, the fold against your face.
And @Boaraxa, chillingly pertinent signature quote. Can you include a link to the source in your signature?
Bookmarks