What is missing are 2 weights that should be supplied free so that one can improve biceps etc.
I have never been able to decide whether the variable prisms become more opaque with time, say ten years, and if transmission is reduced.
It could equally be that my eyes transmit less over the last 15 years.
I have never been able to decide whether the variable prisms become more opaque with time, say ten years, and if transmission is reduced.
It could equally be that my eyes transmit less over the last 15 years.