
I bought 3 of these and they all work great! I have tested them with a blue light test strip and they do not transmit blue light. You have glare. One of my computer screens does not face any window etc and has very little glare. My other 2 screens get some window exposure so there is a little shine. When the computer is off it's very noticeable, when it's on it's not so noticeable. It's a little annoying, but with the amount of blue light blocked, it's definitely worth it!

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