Rearview Spy Sunglasses,UV Glasess Rear View Eyeglasses for Cyclists,Commuters,Rowers,Bikers, Black, Large

Needed these to be able to see behind me when riding my bicycle on the road. Work as advertised and they give a good field of vision though you do need to slightly turn your head to get the right range of vision. If you are lion for an inexpensive alternative to mounting a mirror on your handlebars this is it.

not study. runs small . not best feild of vision.

I bought these as a cyclist. For years I have used a postage-stamp sized mirror on a stiff wire that attaches to the left stem of my sunglasses. As I have a road bike I've had to bend the wire to see over my own shoulder but reference it frequently. The only problem is that sometimes I whack it and must re-adjust.These glasses promised the possibility of no more adjustments. It does take a bit of getting used to as you are looking forward but everything to the right and left is racing backwards in the mirrored section - almost vertigo inducing!If you are riding an American style, upright bike where the torso is fairly vertical these might be quite effective. I ride a road bike, however, where the bike geometry is such that I am looking down at about 45 degrees. In this situation the glasses are reflecting upwards in the rear forcing me to try and see over my own shoulder. Down in the "drops" you simply cannot see parallel behind you at all. With hands on the bar or up on the "horns" things are a bit better but still requires craning your neck to one side or the other. I will continue to try and use these but am thinking I might go back to my little mirror as it sees further behind without the need for contortions.

I have a lot of problems with cyclist and joggers coming up behind me with my large dog and surprising us. My dog is reactive and will jump at them, so these glasses are extremely helpful in helping me see in my blind spots!!

When new the sunglass mirrors worked well although construction was flimsy. Yesterday the rear view disappeared both lenses

These glasses are so much fun. I'm not really trying to spy in anybody. But I wear these to the store and I can see everything behind me, Just a fun little game to play with yourself and if you're using an real life, that works too.

The Quality of the case was nice. But lenses/mirror, were Very cheap. Save your money and Buy the cheap kiddie ones.

The outside lense edges do allow you to see behind you...you may have to turn your head right and left for more view. However, be careful when cleaning the lenses. They smear/scratch super easily as if you're washing the coating off.