I bought these glasses for my daughter's 'spy' themed 9 year old birthday party. It was part of a 'spy kit' each girl got before they started their spy mission. Anyway, the girls loved the glasses! You can see behind you quite well. She still plays with them post-party, sneaking around and playing spy.

I recieved these glasses as a gift and was amazed that when I put them on they actualy worked. It did take a lot to get to know how to use them but after, I was able to see anything behind me.

Now your probably wondering, "If I liked it so much why give it a 3?" well although they work and you can see behind you it doesn't always mean you can see clearly. Because of the fact they're sunglasses when you look behind you it is kind of dark and also the idea of looking behind you is kind of dangerouse when you have to deside weather to look behind you or in front of you. I have gotten into about 10 accidents because of not looking in front of me. So, does work but, do not use when in motion!