I don't throw away my old glasses. I keep them in various places as backups, such as in car gloveboxes, in the home emergency kit, in a bag while traveling and so on.
When I was younger I used to tease my Mom & Dad for essentially treating their reading glasses like pens or pencils, and letting them diffuse around the house as the acquired new pairs.
Now that I'm in my mid-40's, I take it all back. Having a pair, even if it isn't the exact right one, always with reach is a godsend.
Me too. I have around 10 pairs, so I never find myself in a room/place without them. I like Dr. Dean Edell’s for their combination of style/comfort/build quality/light weight. $9.99/pair
Me too. Even though my eyesight continues to deteriorate, a pair of old prescription glasses is many times better than no glasses at all in an emergency!
Now that I'm in my mid-40's, I take it all back. Having a pair, even if it isn't the exact right one, always with reach is a godsend.