Why does carry transparent glasses?

[Feurata]

I noticed oftentimes, that often carry transparent glasses. Onsimilarity as for sight, only lenses ordinary transparent. Fo rwhat does carry such glasses? Fashionably, stylishly?
Who of you does carry glasses?

I have transparent glasses.
I tried the opaque ones but kept bumping into things.

oh yes - my lenses have anti glare on them.

I'm always amazed that people notice things like this (I mean, that lenses are transparent)- but maybe the OP is seeing glasses that she thinks are transparent but it's just the coating?