The AntVR has a headstrap, fits over glasses, but does not have a button -- but DOES give you access to the screen itself:

http://www.amazon.com/Virtual-Reality-Glasses-Ultralight-Adjustable/dp/B01CSFVQ70/ref=sr_1_4?ie=UTF8&qid=1465229261&sr=8-4&keywords=ant+vr

I have one and like it. It has a very decent 100 degrees field of view, is very light, and fits pretty much any phone. HOWEVER, it does let in light from the sides, which can lower immersion.

I really like the Baofeng Mojing 3 and the FiiT VR, both of which fit over glasses. They do NOT have a button, but you can buy them bundled with external controllers.