I don't think reading glasses will help, since they are used to correct farsightedness, and it sounds like he has nearsightedness possibly with astigmatism. The first thing is to first: never lose your glasses. Make/get a keeper strap for them. If you can afford it, have a backup in your pack. Know your prescription so that you can get a pair quickly made, and keep a copy in your backpack and one online somewhere. And if your vision is really that bad, learn how to use a walking stick. I went without glasses for a while when I was little, so I actually recognized people by the way they moved, I was smart enough so that people didn't realize I couldn't see- they just thought I was a little dim in certain ways.