I had the worst experience ever with this company unfortunately! I would have given less than a star. I ordered my ergoprismatic loupes in January and I just got it a week ago, their measurments were not right they had me make measurements and send them and finally they made one by guessing some measurements. The loupes are horrible! Wrong working distance, double vision, dark field. Wrong magnification that doesn’t make a difference to wear it or not besides making me noxious for the wrong measurements. The customer service are unresponsive and not reliable. They opened a ticket and had me adjust it in which it makes them worse than better and doesn’t work and they still want me wait for a solution that never come up!