3.00 Diopter Opticard Emergency Reading Glasses Carry in Your Wallet, Purse

It works fine if you don't have reading glasses with you. It fits in a man's wallet. It won't stay on your nose but the price was right.

I bought these for all my vehicles. I have them in a "survival" bag in each vehicle along with survival food, water, whistle, mirror etc. they work great and keep the bag compact. I may need to read a compass, smartphone or a map and these work perfect if my glasses are gone.