So are yellow glasses completely useless?
-
The best studies of daytime use are for IOLs (lens implants after cataract surgery) because people have to wear them all the time. Using that example, elderly people in these studies tend to have better sleep outcomes with "clear" lenses rather than blue-blocking ones. You don't want to reduce the levels of light you see during the day, and there are lots of ways to reduce the light you see at night - changing the place you are, changing lightbulbs, etc.
For nighttime, the filter that is "effective" at blocking light at night depends a lot on the light levels you're exposed to. So if you're in an office that's 500 lux, you'll want some serious filters. If your living room is 50lux, you can use a much less intense shade to get close to physiological darkness.
Personally I do not pay for high-energy blue filters (400-430nm) on my glasses, but I do pay a lot of money to get a good anti-reflective coating, because I don't like glare.
-
@herf Thanks! Can you comment on my follow up question as to whether sunglasses are useless for people who already wear prescription glasses? -
i.e., all of the articles saying "You should wear sunglasses!" say it's because of UV light. But prescription glasses wearers - like you and myself - are already wearing lenses that block out UV light. So other than not squinting, is there any heath reason to wear sunglasses?
-
I use sunglasses only rarely, actually - was trying to drive on too little sleep a few years ago, and I found it much easier to be alert without them. Sometimes I wonder about getting a less-dark lens instead, but for now I use my regular glasses all the time, where as you say, the UV protection is quite similar.
There are situations where light is really bright (sun reflected on snow or water) where sunglasses protect your eyes from potential retinal damage.
And of course if it hurts your eyes to drive into the sun, avoiding an accident would be good for your health also.
-
@herf Because I spend way too much time thinking about things - if you think about it wouldn't green be the ideal tint for daytime usage?
i.e., it'd let in more of the 480 nm long-blue cyan light to keep you awake, more than any other color, while still blocking a lot of light in sunglass usage. And if you're someone who wears yellow lenses for "comfort" or contrast, green lenses should still filter out the dreaded blue light while keeping you awake.
Am I wrong?
-
@czilla9000 I think color perception is good too, and there are some reasons to think that wider-spectrum light, like you see outdoors, is good for other reasons (vitamin D, retinal rhythms, myopia, etc.)
-
Vision problems are unfortunately one of the hazards of too much screen time. In fact, the Vision Council found that 70 percent of US adults in one survey reported having some kind of digital eye strain (strained, dry, or red eyes; blurred vision; headaches; back pain; neck pain; or general fatigue) as a result of using digital devices for hours at a time.
-
during the day you dont actually want to block all blue light from your environment as we need blue light during the day to stimulate wakefulness and hormones with dopamine and serationin . a good quality blue light filter lens needs to filter blue light down by approx 50% especially around the 450nm mark as this is the part of the spectrum that is most damaging! You are right in the many of these clear lens blue light glasses are a scam as they only block 10-20% of blue light and normally only from 400nm-430ish nm, so they dont even filter any at all at the 450nm mark! www.BlockBlueLight.com.au do these computer glasses the remove 50% of blue light across the whole blue light spectrum, so using something like these during the day are perfect!
-
@ebbs3801 Yeah, they've debunked the blue light thing recently. It's not disruptive to sleep.
https://time.com/5752454/blue-light-sleep/
https://www.sciencedaily.com/releases/2019/12/191216173654.htm -
@Iron-Arm no this press was way out of line. It answered a very technical question (in mice) and did not at all dispute the contribution of melanopsin, which is responsive to blue-green light. See my notes here:
-
@Iron-Arm Yes, I also made a reply to this under "new topic" which was suggested. This is a good general principal to keep in mind 1. one study does not 'debunk' a theory 2. Mice/animals are helpful, but still not exactly the same as humans. These mice likely (in fact I'm sure) have spent their entire lives in a lab setting, probably under floursescent light. Their 'baseline" could not be considered the same as ours (hopefully). 3. One must take the quality of the study into account (many blogs (like Science Direct - it sounds "sciencey" , but these are studies interpreted by people who aren't necessarily able to do so. 4. Follow the money. This study was funded by a Biotechnology company. For obvious reasons, they will not want blue light to be a negative thing. (nor EMFs). If you are not aware, trust me (lol, a complete stranger); that a huge problem with the current state of science is that outcomes that are published are controlled by the funding sources - largely pharmaceutical companies and now - big tech.
Hence, we do not hear about the negative effects of things related to all the new technology.
-
This post is deleted! -
Well the glasses won't make you better at gaming, they'll just block the blue light for the screen to cause less strain on your eyes. As for the brand any should do. Some have more of a yellow tint than others. i would prefer using KLIM Optics Blue Light gaming glasses. It's yellowish tinted glass lens and superior quality TR90 Frame offer supreme protection without compromising style.
-
Might make you worse at it! Here's a new article - figure 2 says people are better at adding numbers when they see more blue:
https://www.frontiersin.org/articles/10.3389/fneur.2021.624217/full
-
yeah, I guess so, they are literally outdated.
-
Basically, glasses like Gunnar aren't tinted enough to do anything
-
@StevenBrown said in So are yellow glasses completely useless?:
KLIM Optics Blue Light gaming glasses
Thank you for the information. I've been working a lot on the computer lately and my eyes are getting tired, I wanted to try protection glasses. I will try this option.
