I just filled my garbage models with 6 magnifying glasses of all shapes, unfortunately with optical plastic pretenses. There, I saw, I do a lot of precision crafts, smartphones, electronics, jewelry, and it's been years that I piled magnifiers of all kinds, as ridiculous and unnecessary and uncomfortable. There, I saw, well, it is true that for a beauty contest, it is not ideal, by cons for tinkering is the Top. These are real optical in Glass True, the headband is lined with real leather, you get used to very quickly, adjustable back allows to adjust it to the right size, and does not disrupt. The upper section allows working near a lamp without reflections on the glasses. There are different perspectives with the working distance indicated. In short, it's not cheap, but I do not regret this purchase, but happiness! @ +
