Old stereotypes deemed the bespectacled the weakest of the bunch, but in case of an emergency, your glasses may make you into the fittest for surviving. Casey Lyons highlights the myriad ways you can use your glasses in survivalists situations. It's a little tongue-in-cheek and a little truthful, but it's worth a read. As one of your nearsighted brethren, it's good to know what to do with what you have. If you can't use your specs in these specific ways (if the lenses are the wrong type or the frames not made of stainless steel) you can easily apply these techniques to other gear or materials you might have handy.
How to Survive with Eyeglasses [Backpacker.com]