Being an old man and having to wear glasses, I have become much more aware of the need to have a backup plan to let you keep having good vision after TEOTWAWKI. My first suggestion would be to get an annual checkup with your Doctor. This may let them catch problems early and your prescriptions will be up to date.
So far, I have been fairly lucky I can still pass the driver’s test without glasses, so I really just need them to read and for close work. I have probably 10 – 20 pairs of reading glasses that I have bought at the dollar store. An optician once told me how to choose the right reading glasses for you. He said to hold a business card in front of you at a comfortable reading distance and try the different lens, when you find one that works for you, buy it.
Always have extra pairs of glasses, if you are short of money like most of us, you can get them off the internet. I have had several people recommend that I get glasses at Zenni Optical. I have looked at their website and they have some very inexpensive glasses. I plan to order an extra pair through them after my next eye exam.
When you get new glasses, keep your old ones especially if the prescriptions are fairly close to your new ones. Even if they are not, an old pair of glasses may work for someone else or the parts from the frames maybe useful.
If you can afford it you may want to get ballistic glasses, these are the top of the line. Here is an older post that I wrote on them Sports and Ballistic Safety Glasses for Preppers.
Because eye problems can crop up unexpectedly you may want to consider some of the suggestion in the following post. Eye Problem and Long Term Disasters. I have a set of the magnifiers and find them useful when working on small objects. Plus magnifying glasses have a dual purpose; they can be used as fire starters.
Don’t forget to pick up a couple of sets of eyeglass repair kits next time you are at the drug store. They are inexpensive and often can repair your frames.
Now that you have extra glasses and repair kits, be sure and put an extra pair in your bugout kits and vehicles. Don’t leave them all in one place.