Recently, I tried buy non-polarized clip-on or flip-up sunglasses for my
prescription glasses. There hundreds, but all were polarized. Does
anyone know where non-polarized clip-ons or flip-ups can be found?


Any reputable optometrist should be able to put non polarized lenses in
your clipon glasses - when I bought my first pair of corrective glasses
the clipons that came by default were polarized, i asked for them to be
replaced with non polarized lenses, it added the benefit of choosing the
tint I wanted. Additionally I would recommend getting corrective
sunglasses instead of clipons for your regular glasses.. I found the
clipons let in too much light between the tinted lens and the corrective
lens. When buying dedicated prescription sunglasses you can choose non
polarized lens.

Cheers,
Luke