A bicycle helmet is a helmet intended to be worn while riding a bicycle. They are designed to attenuate impacts to the skull of a cyclist in falls while minimizing side effects such as interference with peripheral vision.
A reflective surface, now typically of glass coated with a metal amalgam, that reflects a clear image
A site on a network that stores some or all of the contents from another site
(mirror) polished surface that forms images by reflecting light
(mirror) reflect as if in a mirror; "The smallest pond at night mirrors the firmament above"
Something regarded as accurately representing something else
(mirror) a faithful depiction or reflection; "the best mirror is an old friend"
Chuck Harris Bicycle Mirror
My original Chuck Harris bicycle mirror from 1972. He makes mirrors for helmets as well. The prototype clip-on for contact lenses never took off.
After cycling awhile with a mirror, you feel naked without it.
O meu SUV
Handlebar rearview mirror, plus another one on the helmet (still assessing this one).