For $10 -$20 You can buy a pair of polarized non prescription sunglasses which are sized to wear over your regular glasses. Walmart has them in their optical deapartment. COSTCO optical sells clips in a variety of sizes. One might fit your regular glasses.I guess the safety net is my regular glasses. It's harder to drive with those, but I'll survive the week. I'd still rather not lose my sunglasses, of course!
Handy if your sunglasses break or are lostt. Clips are easier to carry then a second pair of glasses.