Great adjustable glasses!
I bought them to block out blue light so I could watch tv before bedtime without the blue light messing with my melatonin. (Good to have a 1.5 hour pre sleep routine so I use them 1.5 hours before bedtime). Every night I have gone straight to sleep! They work!
Great stellar too; prompt and I had a nice message thanking me for buying them!
If you aren't aware of the dangers of blue light from PC monitors, LED lights, fluorescent light Stick with it to find out a host of health problems caused by blue light. You've heard of melatonin, poor sleep and circadian rhythms ? These block out a lot of blue, I couldn't tell if the kettle was on as the light is blue
These glasses are really helpful, if you struggle with LED lighting. They don't solve the problem for me in all instances but they do really calm down a lot of LED. You can't see blue through them at all, blue light or even blue clothing!