There have been a couple of threads talking about LO's losing glasses. My suggestion has been to stock up on them because they are cheap and not worry about it. Goggles4u is having another one of their frequent sales. Right now it's 2 pairs for $10. There's also probably shipping which is like $5-$7 if I remember right. Sometimes they ship for free. Now this isn't a big save since the regular price is $7 for a pair so $14 for 2 pairs, but $4 is $4. This is for their cheapest tier of frames and the cheapest lenses. They work fine though. I'm wearing a pair of $5 specials right now. They look like they cost much more than $5.
The website is goggles4u.com and the coupon is "2FOR10".
Freq, I remember when I used to go to opticians for $400 glasses they would do the same about fitting. They would make a great show of it. I found that I still fiddled with the fitting myself when I got home. With these mail order glasses the only thing I always do is flatten out the nosepads. They tend to oriented too orthogonally for me. So I grip the pad between my thumb and index finger and give them a little twist until they lay flat against my nose. This is really the only "fitting" I do for every pair. Sometimes the frame arms are a little to "long" or "short". You can do exactly what they do at a store. Heat up the arm and then change where the bend is. Just boil some water in the microwave and then dunk the arm until it gets malleable. Then unbend and rebend until it's comfortable. This is exactly what they do at a optician. There's no magic to any of this. The glasses I'm wearing now I just flattened out the nosepads a little.
I still feel like I was taken for a sucker by opticians for years. When I asked the last optician after the discovery about the prescription, he looked quite ashamed when he agreed that readers would be just the same for me. I can remember all the fiddling about heating up the sides, and have no idea what it achieved.