... .45 mm to 0.90 mm, with general magnifying glass is different, its surface was full of ... lens its diameter is very limited, and the magnifying glass in this field Fresnel played a very ... achieve effect. And now to make the Fresnel magnifying glass thickness is only 0.45 mm, they ... is to reduce the traditional magnifying glass create common organic glass, a magnifying glass weight and volume.Features: ...