The glasses are new so I don't know how strong they really are, but they look a lot to me like $30 plastic or polycarbonate frame sunglasses. Be careful not to scratch the lenses. They came with a heavily spring loaded case to ensure they were well protected. The glasses also came with a microfiber glasses cleaning cloth. I wore them for 8 hours, stood in front of an LED monitor and looked at the sunset, there was much less glare and my eyes were less tired. I also noticed falling asleep. So if you stare at screens all day and then expect to sleep, it can help with sleep problems and burning eyes. As a former welder, I had a lot of experience with burned eyes.
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