I have glasses too, but I don't think it would be that bad in a survival situation. I find that constantly getting new prescriptions actually makes
your eyes worse, as you become more dependant on them and your eyes don't have to work as hard and get weaker. In a survival situation though, your
eyes should be fine with current glasses for 10-15 years. It's not like you're going to have to read fine print from far away. Yes, without glasses
(if your eyes are anywhere near as bad as mine), then you'd pretty much be screwed since the whole world would just be a blur. If you're that
worried, keep an extra pair of glasses handy just in case. Or if you really want to solve the problem, you could get laser eye surgery.



