h a l f b a k e r yThe word "How?" springs to mind at this point.
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I can't believe it ! The sketch for US patent 4490012 [xaviergisz's link] shows exactly what I meant to say. |
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I have used a glasses-mount mirror while cycling for many years, and recommend it highly. It's handy for other situations, too, but usually not quite worth the bother and funny looks. But I'd pop it on for walking on busy roads, or bad parts of town, you bet. |
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You can also get 'rear view' sunglasses, with a wider than normal frame and the outer part of the 'glass' mirrored. (I have seen them up close, just an ad at the back of a science mag.) |
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