Go with Decot. Hundreds of different colors with interchangeable lens for different uses/conditions. They will also give you a low bifocal if needed.
The hansen's look like you are limited to one lens color and the "enable you to obtain a clear sight picture at the scope with a very slight natural, horizontal, turn and tilt of the head as you view down the target line with the aiming eye lined up and looking through the bifocal", is enough to turn me off.
Last edited by battue; 07/25/11.