I have purchased several pairs of blue-blocking glasses from LowBlueLights.com over the last few years. I'm very glad that these products are out there and I do feel that they help me with my sleep issues, but the one major issue I've had with the glasses I've used (aside from the fact that they are somewhat pricey) is that the plastic frames and the hinge mechanisms are not very high quality. Mine always begin to break apart/disintegrate after about a year or so of use, even though the lenses themselves have no issues. For that reason, I've given up on the glasses and have decided to try the screen filters instead. Hopefully I'll have better luck with those!