The frame is light and comfortable, the LED light is only used to illuminate your work area, inevitably reduced.
Magnifiers it itself is plastic, but for the price it is not surprising. This is an advantage for the weight: they are lightweight and have perfect optical quality .. but will be susceptible to scratches. Magnifiers are also delivered in a rigid storage box which should well protect them.
These magnifiers are not for reading but for precision work, either crafts or sewing. The distance comfort is between 25 and 30 cm of the eyes, and the visual field is at this distance approximately 2 cm high and 6 cm wide, which is very comfortable.
Small problem: fixing loupes on the frame is a little sketchy.
Erwann on Amazon.com