If you wear glasses like me, sometimes you misplace them and you find yourself in a dire predicament: How do you find your glasses if you can’t see without them? I just discovered this howto video which explains how to make emergency glasses out of a leaf or a piece of paper. I tried it, and it works!
Squinting can work as well. You’re simply going for a tighter aperture for hopes that there will be an increased depth of field in which all objects will be equally in focus. On a camera, this is normally close to f/11 or f/16 depending on the focal length. The downside being at this aperture that there’s very little light coming in. More “open” apertures like f/1.0 will only have a tiny tiny distance range that is in focus, but it lets a ton of light in.
Basically, this doesn’t work well in the dark, but works great to read a streetsign on a sunny day.
Fun stuff. I wonder what would happen if you got pulled over driving with two leaves taped to your eyes and told the officer that you lost your glasses.