"Serious need" is a kind way of putting it. Totally freaking nearsighted is what I am. I always take my spare pair of glasses with me on overnight trips. Carrying them in my EDC would be genuinely burdensome and would require a larger kit.

I figure if the glasses I'm wearing get damaged beyond repair, then chances are good that I, too, have been damaged beyond repair!

I never take them off except for sleeping, showering, and you-know-what-else. Grin.