DefenderShield Fit Over Blue Light Blocking Glasses Computer, Mobile, Gaming, Sleep, Anti Eyestrain, Headache

I don't know how you can tell if these are actually blocking the harmful aspect of blue light. They do change the colors that you see. The white is gold, you still see blue. These fit well over my glasses. They did give me a slight headache.  There are mixed messages as to the danger of blue light.  Supposedly if you spend more than two hours a day in front of a screen, wearing these might be advisable.  I figure they can't hurt me and possibly might help.   Really don't know from the things I have read. 

From the vendor:

• Composite frame
• Anti-reflective lens
• Non-polarized
• Lens width: 53 millimeters
• ✅ Superior lenses filter from 50% up to 99% of blue light that can cause digital eye strain, premature eye-aging and interfere with sleep.
• ✅ CR-90 lenses are lightweight and shatterproof. Both yellow and orange lens filter options block 100% of UV light. Anti-smudge coating help lenses remain clear for all-day use. Anti-glare coating helps eliminate reflections from the front and back surfaces of the lenses.
• ✅ High-end hypoallergenic and renewable acetate frames are durable and lightweight.

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