Those do not work for everyone. I bought some glasses from this company for my father, both he and a colorblind colleague could not see any improvement apart from a slight contrast increase after a few hours of wearing them. One of them was slightly red-green colorblind, the other one had a much stronger red-green color blindness.
The company seem to exaggerate a lot the effect of their lenses with carefully selected overenthusiastic testimonies.
The good thing is that the glasses could be returned and refunded.
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