Collapsible Smartphone VR Goggles-X

This is my take on the Google Cardboard idea – a frame with lenses that very inexpensively turns your phone into a pair of VR goggles, like a very low budget Oculus Rift. Google Cardboard is very bulky though, and makes it hard to use the touchscreen while the phone is inside. It's also impractical to transport. So I made this.

Features:
* collapsible
* collapsed only 6 mm flat
* uses inexpensive Google Cardboard lenses (e.g. from eBay, see below)
* attachment points for a head strap
* c