These glasses are strong enough for the material used, so no complaints. However, all five pairs are very washed out throughout the glass, with a small spot in the center that you can (at best) see through. I can think of several other brands that I've bought many times that are made from the same materials, but the quality of the lenses is crystal clear. I thought I would try this brand because it has the power I was looking for instead of waiting for others to replenish. No, never again! I don't recommend these at all.
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