Three that I recall. First pair was in my early twenties, some weird blue bug eye mirror things that I thought made me look cool (they didn’t). Second was a pair of Fossil sunglasses in this cool gunmetal color/material with prescription lenses, acquired shortly after the bug sunglasses. Those lasted me for years. Current pair are Raybans with prescription lenses. They’ve lasted quite a few years as well.

I wear normal glasses as well and keep my sunglasses in a case. I’ve never sat on them.