We are used to symmetry - 2 hands, 2 feet, 2 eyes, 1 nose with 2 nostrils. This is how we are designed. Google Glass decides to take an asymmetrical approach and that may be the biggest reason why people won't go ahead and plunk down ever a few hundreds bucks for this desigh.
The reason is simple: If you wear glasses you wear them usually in a design with both lenses with the same material.
Even this, although bulky would look better. A nice top border and you're getting there, although still not quite there. Why not hire Luxottica to help you out, Google?