Hare two other options I believe you should consider before buying the non-prescription eyeglasses.

1) You are advised to get a pair of contact lenses. Ask your optician about lenses you can "put in on Friday and take out on Monday".
2) If your eyes are not too bad, you could try going without any correction at all, see the world from the point of view of the original boys.

I could be wrong and if I am I'm sure someone here will correct me, but I've always gotten the impression from the images I've seen that actual eyeglasses were very uncommon for the rank and file.