There is a new generation of "Sport " sunglasses with a built-in HD camera. The technology has advanced enough to make it practical and inexpensive. It's the next logical step from a GoPro.
Below are two models I'm looking at, leaning towards the Gogloo E7 available at Amazon for $150 because you can tilt the camera.
Gogloo E7
This is a sample video from the camera, pretty good...
The cheaper model, Powpro ($56) doesn't have Wi-Fi, but I don't really care about that feature.
Powpro PP-SG110
Sample video