Silicone Eyeglasses

The eyeglasses I am interested in are frameless and the arms of the frame (the parts that go next to your temple and over your ears) are hollow and clear, like a silicone tube. They weigh practically nothing. I can't, for the life of me, find these eyeglasses online and I don't have immediate access to the store where I saw them. Need some Google search experts, here. Thanks!
No, not safety glasses - prescription eyeglasses. Just like any ordinary pair of eyeglasses, only these have thin, hollow, clear tubes instead of metal frames. They also do not have a frame around the actual glass.