edit:

I made some minor changes in v2/v3, here:

https://www.thingiverse.com/thing:3344213

Wanted a place to set my glasses at home and at work, didn't like any of the designs so I made something quick myself.

Any resolution is fine, I did mine at .2mm. Do use supports, you need them.

I have a shorter and longer version in the back, depending how high the arms are. Check both and see which is best for you