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As an amateur astronomer, I've done a lot of research about light pollution. That led me to research about how light affects sleep. Here's the summed-up version so you don't need to read all those scientific papers I have:- Blue light is great for being awake - that's why you wake up with a blue sky (read about melanopsin and melatonin on Wikipedia)- Blue light is not good for sleep; in the 470 nanometers range, that suppresses melatonin (a key hormone for sleeping well)- Humans (and other animals) evolved to sleep in the dark - or, at the darkest, full Moonlight (just 0.1-0.3 lux of light)- Longer wavelengths of light were the only source of light at night for most of human history (fire / candles)- Tablets / phones / screens / LED's and many CFL bulbs have strong blue wavelengths that are messing with our circadian rhythms and suppressing melatonin, because they have wavelengths shorter than 530nm - 540nmSo what to do in our modern world? Wear these glasses before bed. Natural melatonin production would have occurred with our ancestors starting with the onset of sunset. Wavelengths of light from the setting sun would have shifted to red, and fire or candles were usually the only form of light available. Those are both relatively dim, and in longer wavelengths.Today, our "connected" world has a LOT of blue light. It's messing with our sleep patterns, because our bodies evolved to only see red/orange/yellow light at night, NOT blue light/shorter wavelenghts.THESE GLASSES BLOCK THOSE MELATONIN SUPPRESSING WAVELENGTHS.Put them on a couple hours before bed. For me, I start getting drowsy about 90 minutes after wearing them. The trick is DO NOT take them off without closing your eyes or being in a dark room (a room with ONLY a dim red light would work too, as your melanopsin won't trigger melatonin suppression with red light). So when changing for bed, close your eyes when removing your shirt if you have to pull it off over your head or put your night time clothing on.Then leave these on until you turn out the light for sleep. And be sure to sleep in the dark too, or wear a sleep mask. Small amounts of light can still affect your melatonin (well, anything brighter then full Moonlight - yes, even a blue LED on your computer). You can watch TV with these on, check your phone, read your tablet, work on your laptop - just note that colors will look weird. Blue looks black. Yellow looks white. Greens look weird. And the glasses aren't exactly stylish.But if you sleep better, who cares? They work.And while you're at it, make sure your home's lights (and business if you own one) aren't shining into other people's homes or apartments. Too much light at night is what makes these things necessary in the first place. We don't need all this light at night; these glasses are just a band aid to help; what we really need is smarter outdoor lighting - aimed down, at the ground, at the proper color(s) so we aren't suppressing others melatonin. According to a Harvard study, the U.S. loses $63 BILLION dollars per year due to American's insomnia. Artificial light at night messing up people's sleep is undoubtedly part of that - let's fix that so these glasses aren't as necessary.Oh, and did these glasses work for me? An emphatic YES, they did. 5 nights (so far) of excellent sleep and well-rested mornings. And I am NOT a morning person! They work - just use them the right way, and be sure you're not doing other things that might hurt sleep (too much caffeine, lack of / too much exercise right before bed, sleep apnea, etc.) So if it's not a medical condition, do the right things, wear these, and get better sleep.Giving these 4 stars because they get the job done; reduce my straining, and even help with light sensitivity when I have a migraine. However, one of the temples (arms) fell out within two minutes of me putting them on when they arrived and pops out multiple time a day. I guess you get what you pay for but pretty annoying. Otherwise, a great low cost option for electronics in the evening and even working long hours during the day in an office job.In my hunt for blue blocking glasses, the Uvex Skyper glasses were a game changer. My problems with the Skypers were I have a fairly large head, which caused the Skypers to expand over a few weeks of wearing. Also, Skypers are front heavy, which makes them a bit awkward to wear during the day. Thus, I discovered these on Amazon. The Skypers still have specific advantages over these glasses, which I'll discuss. However, I've found these to be a great pair of glasses for all day computer and blue light blocking use.Pros:-These fit around my large head with some, but minimal to modest pinching.-The lenses themselves have the same substantial level of blue light blocking as the Uvex Skypers due to the SCT-Orange design of the lenses.-The overall center of gravity seems well balanced. I'm not immediately concerned that these glasses will fall off of my head, and I'm doubtful they would outside of extreme head movements or a deliberate attempt to shake them off of my head.-Style is relative. Subjectively, I'd say the style type when worn is "sporty safety glasses". These may not be quite the most stylish blue blocking glasses, but I haven't gotten any noticeable sideways glasses for wearing them. This will take a bit more evaluation in an office setting, but I'm fairly confident they'll work. If anything, depending on individual tastes and the specific setting, they're at least as stylish as some of the $30-$40+ blue blockers at half the cost.-The flexible frame design should fit quite a few head shapes, I would imagine.-The SCT-Orange lens technology deserves 6+ out of 5 stars in my opinion for the job it does.-In my fairly amateur UV tests (shining a UV flashlight through the lenses to detect if I can see the security features on money, government ID cards, etc), these held up to any lens I tested in terms of UV blocking.Cons:-The biggest con is the temples out of the packaging were noticeably lobsided, much like you'll find on some convenience store sunglasses or reading glasses. If this is a con, then jumping up to a $30+ pair of blue blockers may be better for you, though no guarantees there either that I know of. In the case of my pair, the left temple is higher than the right temple, exact opposite of what I look for in glasses. However, as mentioned in the pros, the frame is surprisingly flexible, and I was pleasantly surprised that I could flex the frame just a bit to fit my face, and it's worked so far.-The overall experience yields a hardware-store-like experience to the glasses. Not bad in and of itself, just be aware of this. The same tends to hold true for other <$16 blue blockers, so FYI.-Especially as compared to the Skypers, some ambient blue light can enter underneath the lenses, just a bit around the sides (not much, and that could be my large noggin), and just a tad through the nose area. This could be a pro depending on the usage, but also a con if you're looking for full-on blue light blocking therapy glasses.As suggested I have a pair of Uvex Skypers and other blue blockers I've been demoing to find the best. If using Uvex glasses, I'd probably use these during the day at the computer and for general use, and use the Skypers as full-on blue blocker therapy glasses before bed and as needed. For around double the cost of the Uvex Skypers though certainly not unreasonably priced, I'd say these have value for those looking for a lighter, more stylish alternative to the Skypers who can put up with a bit of ambient light around the lenses, and also for those who have larger heads. For what imperfections they have, compared to the job they do at the cost I paid, 5 stars is absolutely justifiable.Have used these for years and the ultimate test was the night a police car was outside my window all night with a downed power line. It was too bright to sleep, so I put on the UVEX and the light was GONE! Completely. I thought he must have turned his off, but looked outside and it was on and looked like a dim little glow. TEST PASSED***Returning to replace my old ones and way more expensive! Shop! Model S1933X.They are two large and a bit heavy for my face. But I still use them at night. It would be great if they would have a choice of magnification.Bought these as I was looking for some cheap blue light blocking glasses to help my sleep (terrible insomniac iPhone addict) and as an alternative to the crappy lumie clear goggles.These are very orange, and definitely blue blocking. Block as much if not more blue than the lumie goggles, and way more than the foam padded bolle goggles I tried.Photos: The lumie has red and blue LEDs. Together these emit a bright lilac glow, but with good anti-blue filters, you only see the red part of the glow, and the blue rows appear off. This is how I determine whether glasses are suitable for this purpose.They are reasonably comfortable, no rough edges and the arms are flexible and adjustable for length.Whole field of view is covered by the visor. Also appear to be made by Honeywell.Pleased so far and would recommend.These are great quality for what you're paying. Use them with a light warming application such as f.lux for the best results.Positives:+ They hug your face really well, the side shields keep light out and the tint makes sure no (or very little) blue light will reach your eyes.+ I saw an analytical graphic and these glasses block out about 98% of blue light, more than enough to see the health benefits (better sleep etc).+ A very good price point, well priced indeed.Negatives:- They aren't that stylish, but don't look awful either. They are substance over style, and do the job better than other products in this market that are geared more towards aesthetics.- Lower quality materials; this doesn't affect function at all; but plastic is always going to be worse than metal and more prone to breakage.- The strong tint may makes these unsuitable for situations where accurate color perception is necessary, for example playing video games.It's a trade-off, block out more blue light while forfeiting colours or block less blue light and seeing a broader colour spectrum - different glasses in this market will suit different needs.Almost bought one of the other “fake” blue-blocking glasses that block only 10%, while this one does 98%, I believe. The colours do in fact change by a lot, and the white becomes orange (because of the blue light being removed), but the effect is amazing. It’s like transporting yourself into a much calmer environment. Monitor display picture becomes much sharper (it’s hard for human eyes to focus on blue light, which is being removed). One of the interesting side effects I found is that it helps with my red-green colourblindness (deutan) a lot — the greens and reds are much more distinct, like by a lot! Of course, you can’t see blue anymore ;) But that’s the desired effect. The build quality is amazing. I think they are made in the USA by the company providing protection equipment to professionals (they have other protective equipment). To be honest, I buy a lot on Amazon, and this product is the best thing I bought in a while! And I haven’t even tried it before sleeping yet, just wearing during day ;)Ok first off, I'm a web developer so I stare at my monitor all day and then later when I get home. I was getting really bad eye strain, to the point where I couldn't do any consistent work. Went to my optician who said that there was no evidence that anti-blue light glasses such as these helped. Bought some expensive new glasses from them and it made no difference at all.So I thought why not try out on these specs instead...2 days later, no eye strain whatsoever. These are great not just for laptops but also in rooms with fluorescent light, really cuts down the glare.Pros -CheapFits well but there is some pinching over the earsWraps well around the eyes to block out any light coming in from the sides.Works like a charm!Cons -Is a bit flimsy on the frame, so don't treat them too forcefullyYou look like a bit of a fool in the office, or like the guy from Team America World Police. Whatever makes you feel better...Overall 5* - why? Because all the cons are outweighed by the price, I don't expect titanium, carbon- fibre, captain scarlet indesctructible for just over a £10.Well worth a go, if you are getting eye strain at the pc all day!! Try these first before you pay for new glasses!I bought two pairs for my two kids (their ages 9 and 10). They fit great because they are adjustable, but they are still a little too big on their small noses. I tied a piece of sewing elastic band on both sides to keep them in place and it's is working out perfectly. They used to keep watching videos on the nights they are allowed to watch a little bit before bed. I noticed how they could keep watching and playing. Then I read about the blue light and all that type of information. I have made them use the blockers for few evenings now and they don't complain, they find them quite cool. Anyway, I noticed how they start yawning and getting tired so much faster now, they almost want to go to sleep without me asking them. I have tried myself, but during the evening I wear my regular glasses (contacts during the day) and those don't fit with glasses. I want to buy a pair for me now but one of those models made to fit over the regular glasses, unfortunately there aren't too many models yet. Otherwise these ones work just fine...
