Teravan Somnus I Blue and Green Wavelength Blocking OTG Fitover Glasses, Premium Nylon Lenses, Strong Polycarbonate Frame - Reduce Eyestrain and Improve Sleep Quality

I used this product to facilitate falling asleep quicker. It really does block the blue and green spectrum light waves. It stops the blocking of melatonin by the blue and green light. I notice that I begin to yawn shortly after putting them on in the evening and I fall sleep faster now. I recommend them for anyone watching T.V. or using devices in the evening.

The lens provides excellent blue green blocking. Sadly my prescription glasses didn't fit under these. I'd love to see this lens in a clip on.

It is rare and usually a lot pricier to block such a wide spectrum of sleep-disruptive light. So I found that impressive and bought two pairs. I also really like the shape of the fit-overs; they’re much more attractive than the abundant square ones. A few things to bear in mind:*The small lens built into the sides is not red but an extremely pale grey. This is suitable because the light that enters your eye frontally is what really matters. Generally side-glare, even if there is a lot of light, will not be sufficient to reflect into the eyes in a way that will disrupt hormones. The little grey windows allow a bit more light in for reading while still toning it down slightly to ensure you don’t get that reflection.*The glasses should be lighter weight and/or have a nice cushion. If you combine them with readers or prescription glasses, it’s going to get heavy after a while. Also, I feel like the weight loosened the hinge on my readers in the first night(!). Although glasses that only block blue light are of minimal effect for me, I do find myself rotating those ones in and out with these to give my nose a break, which is tremendous a shame.*Compared to some fit-overs their construction is not too overly wide and so is more suitable for a woman’s face. And even without my readers on, the design holds onto me far better than I anticipated.*Be sure that the glasses you wear underneath are clear without any computer-coating or light-blocking, or you may strain your eyes because of the dimness.* The biggest ongoing frustration with these glasses has to do with the lens material. It attracts grime and is nearly impossible to get completely clean, also the lenses readily pop out while cleaning. Both of these factors contrast unfavorably to my bon charge readers and to my regular readers, although I’d say that BluBlocker sunglasses also get very grimy and resist cleaning.*It was initially disconcerting that my blue light devices tended not to go neutral with these glasses on. Some looked as bright or brighter with the remaining light that came through as they did with glasses that just block blue light (Uvex Skyper or Swanwick). Other blue light devices looked purply-blue, whereas the blue light blockers left them greenish. I wondered if these lenses were merely dying everything red and not really blocking. But apart from the sellers reply to my question here on Amazon, I did several experiments: I have a blue led device that is quite bright and had it on in a closed cabinet in a closed room with no windows. Opening the cabinet multiple times with each pair of glasses on, it was clear that more total light was coming through with the glasses that block blue light only. Next I took a blue light detecting card and a blue light (such as come with some computer glasses to prove that they block some of the light), and I held the glasses right against the card with the light on top of the lens for ten seconds. The Uvex glasses left a purple mark briefly (indicating some light had gone through), but the Teravan did not. I also shone the blue light through each lens: It looked green and moderate on the Uvex and dim and orange on the Teravan. These experiments convinced me that the Teravan were in fact blocking more blue light, not less, and that the bluish and purplish lights are just a factor of what it looks like with less green and UV.

I wear these every night from about 7pm on. They really help me set my circadian rhythm and helps me fall asleep. They fit over my glasses so I can still read or look at my phone. The only down side is they make everything orange which stinks when watching a movie but you can't have everything. Also, if the movie is very dark, you can't see it very well. I highly recommend this for a sleep aide.

Ordered in evening, arrived early the following morning, cudos to Amazon shipping service.These were ordered after I returned the earlier ones I ordered. I could clearly see blue color through the earlier amber tinted glasses, so the claim of 99% blocking was completely bogus. Glasses that block blue light will render all otherwise blue objects various shades of gray or black, no sensation of blue will occur to the person wearing the glasses.These glasses block blues and greens completely as stated. If you want to block light that interferes with sleep, these are an effective way to do that. Their transparency to other wavelengths of light is very high, so even though they block the blues and greens, they are not too dark to allow comfortable functioning in the evening.These glasses work, and are highly recommended.

Love it as it makes colors brighter as well as best protection for my eyes.

These help me to shut down at night.

These work as stated. I like that my eyes are protected when I wear them.