how do I know what size to order

My little guide to Gamma Ray computer glasses. All numbers are in mm. The first number is for the horizontal size of the lens. The 2nd is the bridge, the gap that sits on your nose. The last number is the length of the two handles that reach past your temples to sit on your ears. gr801 52-18-135gr802 52-15-130gr803 51-18-142gr804 50-18-143gr001 53-17-140gr002 53-17-140gr003 53-16-140gr004 53-16-137gr005 52-18-140gr006 53-16-145gr031-c1 57-15-135gr032-c1 57-15-135I doubt this includes every single Gamma Ray on Amazon, but it seems close.

What percentage of blue light do these block?

According to this site, they block 97%: https://www.tuck.com/best-blue-light-blocking-glasses/ There's also more good info on the blue light blocking topic.

I work on 2 good sized computers everyday, and have insomnia every night. Should I buy the daily or night version to wear at work?

I would buy the daily version for working on computers.

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Blue Light Blocking Computer Gaming and TV Glasses (0.00x Magnification)

Product ID: 162794300

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Gamma Ray Optics Blue Light Blocking Computer Gaming and TV Glasses (0.00x Magnification)

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