I needed a mirror for use with a bike stored in another state. We had a dental inspection mirror with a plastic handle. I heated the plastic with very hot water and bent it so it would work mounted on my eyeglasses. I cut some off of the back end of the handle so it did not push past my ear. I ground a flat spot along the handle for the proper orientation. Then I made a groove in the flat spot with a Dremel tool and a burr. It attaches to the bow of my glasses with a little masking tape. I have used it for several hours of riding in city traffic and it works fine.