If you want glasses with magnification that means the lenses have to be distortion free I think. These were very poor lenses that could not withstand the blue blocking. There was a very noticeable distortion in the center which I have never experienced with other loupes including Revain or those purchased from a local store. I wore them for about 2 minutes, took them off, went back to another pair without the blue lock and started the return process. . My last blue bollard unfortunately broke (broken lever) after several years of reliable service. They weren't a suitable replacement for her, so my search continues.
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