ThinOptics Safety for Keychain Case

I was really impressed with the diminutive size and portability of the ThinOptics reading glasses. Although the keychain case seemed most handy for my needs, I was very disappointed that the glasses came loose in my front pocket during the first use and were badly scratched. I contacted the company, explained the situation, and eventually received a replacement pair. However, I feared the same result would occur again with the new glasses since the keychain case had this design flaw. Therefore, I took some quick measurements and designed a small snap-on safety which should help to keep the glasses in the case when carried in your pocket our elsewhere. It's certainly not perfect and could be a bit better with rounded edges to prevent snagging. Anyway, I think it helps address the main problem with the manufacturer's original design.