
I've tried the chart to see how much power I need. said twice. However, they were too strong and every time I moved my head I thought I was going to throw up. I returned them and bought 1 time and they are perfect. After a few months of headaches, I wore blue light glasses for a while. I stare at computer screens all day at work, and then inevitably I have to go home and sit at the computer to do my personal work. It was great to get some to make the words a little clearer and reduce the blue light. You are cozy.

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