Blue Light – Is Artificial Blue Light The New – No Smoking?
Up until the mid-sixties few people gave any thought to the harmful effects of smoking. People smoked in cafes, pubs, restaurants, trains, planes and their work place.
With the publication in the USA the UK (and the western world in general) of reports linking cigarette smoking to serious health problems; attitudes gradually changed. Nowadays, in the UK people can only legally smoke in their own homes and outdoors that’s how dramatic a shift in attitude there has been.
If you were to go on the high street and ask one hundred people have they heard about Blue Light, let alone the dangers of Blue Light, chances are slim that anyone has heard about it. Blue Light has been mentioned in the mainstream press over the last couple of years, mainly to do with LEDs so to be fair there may be a few who have heard about Blue Light but very few are aware of the dangers.
What follows below is lots of information about Blue Light, Blue Light Blocking amber coloured lenses (and why it’s a good idea to wear them), videos about Blue Light and a bundle of links to authoritative resources.
Finally, if the message has sunk in, you can buy our own NoBlueSpecs™ amber coloured Blue Light Blocking lenses, or clear lenses with Blue Light reflective coating from our shop https://www.reglazeglasses4u.co.uk/shop. You can buy these non-prescription or with prescription lenses. You can have these lenses put into your existing frames or you can buy frames from our shop.
What is blue light?
Light consists of electromagnetic particles that travel in “waves.” The waves vary in terms of length and intensity. The shorter the “wavelength” of light, the greater the concentration of energy. The length of the light waves is measured in nanometers (nm) and each wavelength is associated with a particular colour. All light is categorized into either: gamma rays, x-rays, UV (ultraviolet) rays, visible light, infrared light, and radio waves.
The eyes of humans are only sensitive to the wavelength of “visible light.” All visible light contains colours of: red, orange, yellow, green, blue, indigo, and violet. Within the visible light spectrum, blue light has a very short wavelength (380 nm to 500 nm) and is ultimately more intense to the eye. The effect of blue light can be positive or negative depending on the time of day exposed.
Individuals exposed to blue light during the day generally are in a better mood, have more energy, and are more alert. However, exposure to blue light after the sun has set will suppress Melatonin production and increase your risk of insomnia, poor sleep, and even more serious conditions like cancer. Therefore it is likely important to be cognizant of your blue light exposure and remember – it’s good during the day, but bad at night.
The Sources of Blue Light
Blue light is ubiquitous in that it is nearly everywhere. As light from the sun penetrates the atmosphere, short/high-intensity blue wavelengths of the spectrum collide with air molecules. This collision results in the scattering of blue light in all directions (everywhere you look). Blue light is what causes us to perceive the sky as having a “blue colour.”
Despite the fact that it is produced naturally by the sun, blue light is also artificially generated from technology – particularly digital screens. If you use a TV, computer, smart phone, iPad, or other electronic device – you’ve been exposed to blue light. The light bulbs in your house emit blue wavelengths unless you’ve strategically replaced them; perhaps the worst culprits for excessive blue light generation are fluorescent bulbs and LEDs.
Why do we need to block Harmful Blue Light?
There are several reasons why it’s a good idea to block the harmful blue light from artificial appliances, and two new types of lenses have been designed with this specifically in mind.
The main reasons for the use of blue light blocking lenses is to achieve:
- comfortable, stress free vision,
- fewer headaches,
- long term protection for the health of our eyes,
- resetting the natural body clock,
- Circadian Rhythm,
- aiding restful sleep,
- treating Insomnia,
- our long term general health.
Research is increasingly showing the detrimental effects the strong artificial light is having on our bodies as well as our eyes. The range of effects on our body is so vast, a detailed explanation can be found below and in the links provided.
Simply put: There are two types of the hormone Melatonin. Ocular Melatonin and Pineal Melatonin. Ocular Melatonin is generated from the early morning sunlight and this triggers the production of Pineal Melatonin when it gets dark. The over exposure to artificial blue light from our up to date technology hinders the production of the Ocular Melatonin, which has the knock on effect of the Pineal Meletonin not being produced at night. This is the reason people have poor sleep if they have been over exposed to artificial blue light during the daytime as well as the evening. The Pineal Melatonin is scientifically proven to be necessary for a restful, healthy sleep.
NoBlue Clear Specs, our most often talked about type of lenses are clear lenses which are coated with a blue light protection coating. These are mainly for daytime wear for work and socialising.
Dark Red, NoBlue95, NoBlue75, and NoBlue55 are Amber tinted lenses worn more in the evening to reset the body clock and help Circadiun Rhythm. Blue light disrupts the body’s natural “biological clock” or inclination to wake and sleep at certain times – which leads to compromised psychological health. These lenses are very helpful for night-shift workers, anyone with sleep disorders and to help promote general good health. The Amber lenses are available in 4 shades, the darker the shade, the more blue light is blocked.
Headaches, irritable, sore dry eyes using a computer? Does all this sound familiar to you?
After spending hours in front of a computer screen at work, you go on to spend yet more hours using other electronic devices at home. You often have headaches, fatigue, burning, watering, irritable or reddened eyes, flickering images, and intermittent short sightedness. You’re not alone. These symptoms have become so common; they even have a name, (CVS) Computer Vision Syndrome.
With the introduction of so many electronic devices, our eyes are put under enormous pressure as they are exposed to concentrated harmful high-energy blue light. Few people realise that our eyes are also exposed to harmful high-energy blue light and UV rays at home as well as at work. It is the Violet-Blue from the colour spectrum that may be particularly harmful.
LCD or LED Computer and TV screens, smart phones, tablets, and Fluorescent, CFL and LED bulbs all have a high blue spectral emission. Essentially, if you have any of the electronic devices for, now considered a necessary part of our everyday lives, you’re more than likely already being affected by the blue light in more ways than you realise. Even texting and social media that takes up a fair part of our days, contributes to more and more exposure to the harmful blue light.
We already know to take regular breaks from the screen. Staring at a screen for hours at a time slows down the blink reflex, causing eyes to feel dry. Use of eye drops to try to relieve dryness and eye tiredness can help, but only for a few minutes. Drops are not a long term solution.
Please Note. Not all blue light is harmful. Natural Blue light from the sun is very healthy. The light rays from the sun have traveled millions of miles, and are the perfect strength for our health when we are exposed to them outside in the daylight. The blue light from computers, etc, are very short, just a few feet or even inches away from our eyes. The short length of the rays is 4 times too strong, and this is when it may become harmful to our eyes and general health. If you have blue light blocking lenses, take them off for a while when you are outside, and let the natural, healthy light enter your eyes.
Children, and the effects of Blue Light.
Digital eyestrain does not just affect adults. We now have a smaller, unisex design frame for children containing NoBlueSpecs™75 which are Medium Amber coloured non-prescription lenses. We usualy put the 75% Amber colour in childrens frame, but any Amber colour can be used on request. Non-prescription lenses only for anyone under the age of 16.
Size 45-15-125 Childs frame in trendy Orange and Black – Suitable for smaller children around 3-7 years.
Children are also at risk for eyestrain due to their growing use of digital devices. Children today have more digital tools at their disposal than ever before – tablets, smart phones, e-readers, videogames are just among a few. A pair of amber gaming glasses is a very good idea for all children who, in this media age are increasingly exposed to artificial light.
According to a study by the Kaiser family Foundation, children and teenagers (ages 8-18) spend more than 7 hours a day consuming electronic media. Before age 10, children’s eyes are not fully developed. The crystalline lens and cornea are still largely transparent and overexposed to light, so too much exposure to blue light is not a good thing.
Parents should supervise and limit the amount of screen time their children are permitted, as well as make sure that their eyes are not too close to the screen. This is especially important for health reasons, but also for helping children prepare for sleep in the evening. As we don’t supply prescription lenses to anyone under the age of 16, they are only available as non prescription amber lenses.
What about the long-term effects of over exposure to harmful blue light?
Worryingly, long-term effects of blue light are only now becoming apparent. Many clinical trials confirm that over-exposure to blue-light may silently ravage the photo-receptor cells within the eyes’ retinas over the course of years and may cause a host of vision-destroying diseases including premature and age-related macula degeneration(AMD). The harmful blue light causes gradual oxidation and deterioration of the macula and leaves eyes and body more susceptible to disease.
How Night-Time Blue Light Exposure Disrupts Sleep, Causes Insomnia
When the sun sets, your body responds to the darkness by changing its hormone production to reduce arousal and promote somnolence. Most notably is a shift in the production of the neurohormone Melatonin, which is secreted by an organ in the brain called the pineal gland. The pineal gland begins manufacturing Melatonin several hours before you go to bed; as the Melatonin levels continue to rise, you feel sleepier.
Think of Melatonin as an endogenously produced sleep-promoting agent. It doesn’t knock you out like a sleeping pill, but makes it easier to fall asleep when it is sufficiently produced. In other words, your alertness drops, you feel drowsier, and it becomes more difficult to resist falling asleep.
How To Block Blue Light for Better Sleep
There are millions of people suffering from insomnia, but very few people making calculated efforts to overcome it. Rather than waiting for new sleeping pills to hit the market, you may just need to eliminate blue light exposure after sunset. Below are some ways you can block blue light to improve sleep quality and reduce the likelihood of insomnia without taking dangerous psychiatric drugs the like current Z Drugs linked to Dementia.
- Blue Light Blocking Glasses
One effective way to limit your blue light exposure after sunset is to invest in some blue-blocking glasses. Amber lenses are a highly effective option compared to no intervention at all or wearing normal prescription lenses. Anyone that’s going to be looking at a laptop, playing on an iPad, using a cell phone, or watching TV at night should be wearing blue light blocking glasses for the sake of their health.
- Tweak your lighting
If you’ve customized the lights in your home to change based on the time of day, you’re one step ahead of the game. Specifically, you should focus on implementing either dim lights, red lights, or dim red lights. The tertiary option is likely superior to the first two, but all options are better than standard bright lights (especially LEDs and fluorescents).
- Dim lights: If your lights can be dimmed, you should use the dimmed setting. The dimmer the light, the less your Melatonin will be disrupted by the brightness. Use the dimmest setting after the sun has set.
- Red lights: Some people have strategically installed red lights throughout their home to minimize exposure to blue light after dark. Red lights don’t have as significant of an impact on your body’s circadian rhythm as other wavelengths.
- Dim red lights: Those that are knowledgeable of the effects of light on Neurohormone production may be futuristic compared to others in that they’ve installed dim red lights in their home. These lights can be used for visibility after the sun has set, yet they are the least likely to disrupt hormone (Melatonin) production.
If you want to use nightlights such as to help you navigate to the bathroom during the middle of the night, it would be best to install dim red lights. These will provide visibility, yet won’t impair your ability to fall back asleep. You don’t want to jolt your retinas with a bright light of any kind if you wake up during the middle of the night; this will trick your physiology into thinking that it’s daytime.
It still boggles my mind as to why TVs, smartphones, and tablets aren’t manufactured with screen-filtering technology (or at least the option). Screen filters reduce blue light, while still allowing you to use the device. Although they will not eliminate Wi-Fi exposure (which could cause insomnia), they will not significantly decrease Melatonin production. For this amber lenses are the best option.
Blue light prevents release of Melatonin from the Pineal Gland
Blue light exposure is known to prevent endogenous release of Melatonin from the pineal gland. Thus you’re left with no Melatonin to facilitate sleepiness. Melatonin has a number of other functions such as: acting as a neuro protective and influencing production of Serotonin. Individuals with low Serotonin often also have low levels of Melatonin; the two tend to have a symbiotic relationship.
While a little bit of blue light may not significantly alter Melatonin production, when a certain threshold is met (in terms of the amount contacting the eye), the pineal gland doesn’t release Melatonin. If you’ve been hopping into bed with your iPad, cell phone, laptop, or even watching late night TV – you’re disrupting your body’s ability to produce Melatonin. A Melatonin supplement can be bought from Health stores when necessary to help aid sleep.
Cascade effects stemming from Melatonin disruption
Melatonin disruption may not seem like a big deal, but it really disrupts your entire physiology. Disruption in the endogenous production of Melatonin is capable of triggering a cascade effect – altering other hormones, neurotransmitters, and your circadian rhythm. Deficient Melatonin at night has been linked to a variety of serious health conditions such as: cancer, diabetes, and heart disease.
Arousal: Melatonin production reduces your arousal, thus allowing you to fall asleep. Individuals with high arousal or subject to significant stress aren’t able to manufacture necessary Melatonin to tone down their sympathetic nervous system. If you’re exposed to blue light at night, you are more likely to maintain a higher degree of physiological arousal, or perhaps exacerbate preexisting stress.
Circadian rhythm disorders: In the past, humans never had circadian rhythm disorders due to the fact that they relied solely on the sun for light. When Melatonin production is disrupted by exposure to blue light at night, people develop conditions like shift work sleep disorder; characterized by sleep-wake cycle abnormalities. Blue light disrupts the body’s natural “biological clock” or inclination to wake and sleep at certain times – which leads to compromised psychological health.
Insomnia: Most individuals with insomnia are unaware of the fact that bright light – particularly blue light is impeding their ability to fall asleep. Melatonin is a hormone necessary to help promote somnolence. Some cases of insomnia are likely caused by significant exposure to blue light prior to bed.
Neurotransmission: Melatonin has a symbiotic relationship with many other neurotransmitters such as Serotonin. When one or the other becomes imbalanced, the other may also become imbalanced. This may create an endogenous chemical imbalance, which may increase your risk of developing mood disorders like depression.
Sleep quality: Lack of Melatonin tends to decrease a person’s sleep quality. The body has unconscious physiological processes taking place that help promote health and survival. If these processes (e.g. Melatonin production) are disrupted by blue light, it will impair the time you spend in deep, restorative sleep. An easy way to compromise sleep quality is to inhibit production of Melatonin.
Other health risks: There are an array of general health risks associated with inadequate Melatonin production at night. Since blue light is known to inhibit the release of Melatonin, exposing yourself to blue light may be upping your odds of developing an unwanted health condition.
- Cancer: If you’re exposed to light at night, you may be increasing your risk of developing cancer (both breast cancer and prostate cancer). Low Melatonin levels at night are thought to increase risk of developing many different types of cancer. Adequate levels are hypothesized to have anticancer properties.
- Diabetes: Exposure to blue light before bed may also facilitate the development of diabetes. As your Circadian Rhythms become disrupted, your blood sugar levels skyrocket and may throw you into a “prediabetic” state. Consistently disrupted blood sugar levels may result in a permanent diagnosis of Type 2 diabetes.
- Immune system impairment: When Neurohormone production is altered as a result of light exposure after sunset, your immune system becomes impaired. This may leave you to get sick more
often than others with proper Melatonin production and sufficient sleep.
- Obesity: Those exposed to blue light at night are known to experience a disrupt in Circadian Rhythms. The Circadian Rhythm disruption has been associated with decreases in the hormone “Leptin.” After you eat, your Leptin levels are high which make you feel “full.” Decreased Leptin from Circadian Rhythm disruptions make you feel less full and more likely to eat in excess.
To what extent does blue light affect the Circadian Rhythm and Melatonin?
It should be clear that any light exposure after sunset will suppress Melatonin secretion. That said, some wavelengths like blue light have a significantly greater effect than others. In a study conducted by Harvard, researchers compared nearly 7 hours of blue light exposure to green light; both were considered equally bright. Blue light exposure suppressed Melatonin secretion nearly two-fold compared to green light exposure.
In other words, blue light has nearly twice as potent of an effect on your Circadian Rhythm compared to green light. This means that if green light exposure postponed your ability to fall asleep by 2 hours, blue light would postpone it by 4 hours. Other research is in congruence with the findings by those at Harvard.
A study by researchers at University of Toronto compared Melatonin levels of individuals wearing blue-blocking glasses (to block indoor light) to individuals exposed to standard dim light with no glasses. Researchers found that Melatonin levels were nearly equivalent in both groups. This showed that by simply blocking out blue light by wearing filtered amber lenses, Melatonin levels were nearly the same as someone without exposure to any significant bright light.
Other studies have shown that approximately 60 minutes of general bright light exposure (1000 lux) at night suppressed Melatonin to daytime levels. Although eliminating all light is a healthy idea after sunset, this isn’t realistic for most people. Instead, it may be better to compromise and implement the Pareto principle – target the wavelength with the greatest impact (blue light) on Melatonin suppression.
Here is a useful post that I found on Health Science forum on February 6th 2018
“Blue Light: What better subject for my first post than (Artificial) Blue Light. Currently believed to be the Number One Hazard to Human Health in the Modern World. Sound Crazy? Please, read on…
This topic is dense and I don’t want to lose anyone early on, so I’ll try to keep it simple and get into the deeper science later… This may be quite shocking if you are hearing it for the first time, so be prepared.
You may have seen/ heard things lately regarding Blue Light and its adverse effects on us… Apple quietly added Night Shift to their iPhones and iPads a couple of years ago (They know what’s coming!) and there are other Softwares like f.lux and Iris for Computers and Midnight and Twilight Apps for Android Phones etc… These are applications to reduce or block certain harmful frequencies of blue light.
Blue Blocking Glasses are now becoming more popular and necessary as the word spreads.
Blue Light is TOXIC!! Hard to believe, its just light…. Right? Wrong!!
You may be unaware of this, but Blue Light from Morning Sunlight is what kick starts your Pituitary Gland to start producing hormones.. including growth hormone, sex steroid hormones, testosterone etc..
However, blue light from full spectrum sunlight is radically different from artificial (man made) blue light
Blue light is always balanced by Red light… Red is the Antidote to Blue… Your screen on your iPad/ iPhone/ Computer / LED T.V that you look at in the morning is 4 times stronger than the colour temperature of the Sun… (The Colour Temperature of Blue Light in morning Sunlight is measured at 1800 Kelvin…. The Blue light from your iPhone/ iPad/ computer screen is 6500 Kelvin) with no balancing red light.
You will be stimulating 4 times the normal production of Hormones mentioned above.. it won’t take long at that rate to drain your pituitary gland of hormones.. This seems to be the case in Japan… they are a few years ahead of us with technology.. do a Google search for the ‘Celibacy Syndrome’, A lot of Young Adults no longer have a sex drive as they are drained of sex hormones.
Great for the parents as they don’t have to worry… but not good for our species!!!
Blue Light Destroys Testosterone and ruins fertility..
Melatonin is the Hormone of Sleep… Ocular Melatonin produced in the eye (Via the Central Retinal Pathway in the Retinal Pigmental Epithelium) in the morning, this time by the U.V part of the sun spectrum (when it collides with the aromatic amino acid, Tryptophan).
Sleep hormone, produced in the morning? Yep, you read it correctly.. it’s made in the Morning, then Pineal Melatonin released from tissues at night a few hours after dark.
Blue Light Destroys Melatonin!! Wonder why your sleep sucks after an evening of watching T.V or being on the computer / iPad?
Blue light also destroys the Tensegrity (Length-Tension relationship between the fibres) of the Retina.
Myopia (Short Sightedness) is at an all time high!
Another Google Search: ‘Myopia in Asians’ You will see that in the 1960’s, around 50% of Asian Teenagers had Myopia …. now it’s 97%.
Blue Light also causes Upregulation of Glucose. Blood Sugar Spikes, without consuming Sugar!! There is now strong evidence linking Artificial Blue Light with Weight Gain, Obesity and Diabetes.
If you have replaced your Halogen / Incandescent bulbs at home with LED… Yes, you will be saving energy and saving money, but you may end up paying for it with your health.
Blue light (except for natural blue from the sun) is bad… day or night!!
Is it coincidence we are seeing so many children today wearing glasses?? Or why there are so many overweight children? Or even adults? Or maybe why children are going through puberty at much younger ages than ever before….
Food for Thought…”
It’s important to realize that one of the keys to controlling the risk factors for any disease including AMD is efficient patient education. By wearing Anti-Blue Lenses to filter out 100% of blue light, maintaining a healthy, and active lifestyle, sight-stealing conditions like macula degeneration can be avoided and vision can be preserved into old age.
Most people are unaware of the fact that bright light after sunset probably isn’t healthy, especially if you are suffering from insomnia, dealing with poor sleep quality, or a circadian rhythm disorder. For millions of years, humans functioned without artificial lights, TVs, and other electronics (e.g. cell phone screens). They relied solely on the sunlight and their circadian rhythms adjusted; making it easy to rise with the sun and sleep after sunset.
In the age of technology, our senses are bombarded with bright street lights, household lights, TVs, computers, and cell phone screens long after the sun has set. The problem is that bright light from these sources after sunset stimulates your retina and tricks your brain into thinking it’s still daytime. You may know consciously that it’s “night” but this is an unconscious process – interpreted by your nervous system as the sun being high in the sky.
The excessive light stimulation after sunset triggers a cascade of neurophysiological changes that will detrimentally impact your mental and physical health – even if you aren’t perceptive of these effects.
Although all light after sunset is problematic, perhaps the most problematic wavelength is that of “blue light.” Blue light exposure after dusk has been associated with causing insomnia and sleep disorders, but also more serious illnesses like cancer, heart disease, diabetes and obesity.
NoBlueSpecs™ Amber Lenses - A range of 4 amber lenses in varying shades of amber for all levels of blue light protection
NoBlueSpecs™ Blue Light Protection
Available as Clear Coated Lenses
or a Choice of 4 Amber Coloured Lenses
NoBlueSpecs™ Amber lenses have no coating as the amber tint does all the work by absorbing the blue light. They are available in 4 shades, Light, Medium, Dark and Dark Red, and the darker they are, the more blue light is blocked giving maximum protection. These lenses are especially good to wear when using, or are being exposed to electrical devices in the evening. They will help control Circadian Rhythm and reset the natural body clock by protecting the hormones Ocular and Pineal Melatonin, resulting in a more restful sleep, reduction in Insomnia, and sleep disorders caused by shift work.
Single vision, bifocal and varifocal lenses are all available in NoBlueSpecs™ Clear and the NoBlueSpecs™ Amber colours.
Prices for NoBlueSpecs™ Lenses – Go to the individual price lists on Easy Price Guide by clicking here.
We do not recommend any amber coloured lenses for driving, as the darker shades may alter colour perception, causing hazardous driving conditions.
You can buy our NoBlueSpecs™ Blue Light Blocking Lenses from our shop.
Even darker than the 95% Dark Amber with a deep Red/Amber colour. Guaranteed to block 100% of harmful blue light rays. A dark shade of Amber/Red offering maximum protection – excellent for Circadiun Rhythm and resetting the body clock for shift workers, people with a sleep disorder etc. They will alter colour recognition for watching TV and computer, but are still very comfortable for evening use. We recommend wearing them for 2-3 hour before bedtime
Lenses A darker shade of Amber offering excellent protection – excellent for Circadiun Rhythm and resetting the body clock for shift workers, people with a sleep disorder etc. They will alter colour recognition for watching TV and computer slightly, but are still very comfortable for evening use. We recommend wearing them for 2-3 hour before bedtime.
Lenses A medium shade of Amber that is more natural to look through than the darker shade but offers slightly less protection then the darker shade. Also ideal for Circadian Rhythm and resetting the body clock for shift workers, bad sleepers etc. They will alter colour less than the darker shades, and are very comfortable for evening use. We recommend wearing them for 2-3 hours before bedtime.
Lenses A light shade of Amber offering a more natural look that some people feel comfortable to wear for the office or work place. They offer slightly more blue light protection than the coated lenses, making them a good alternative to the clear coated lenses. They will only alter colour recognition slightly.
NoBlueSpecs™ Clear Lenses - Clear Coloured Lenses - Professional looking for the office, socializing, shopping, and when exposed to LED Lights
Our new range of NoBlueSpecs™ Clear Lens are scientifically proven and block out a large proportion of the harmful Blue Light, while allowing all healthy and beneficial light to pass through the lenses. The lenses are infused with the precise balance of ocular lens pigment and melanin to defend your eyes against harmful blue light spectrums. Further, such lenses effectively soothe tired, strained eyes and ward off computer vision syndrome (CVS) for those who use computers and play games frequently.
Worn mainly for daytime use, the lenses effectively soothe tired, strained eyes and ward off computer vision syndrome (CVS) for those who use computers and play games frequently. Objects and text will also appear clearer, sharper and better defined as a result of wearing blue-filtering lenses. These clear lenses have the least blue light protection, but as they don’t change colour perception, they are excellent for computer use. Even though they offer less protection, they are still very effective at making eyes less stressed, more comfortable after hours in front of a computer and help protect Ocular Melatonin from being destroyed, aiding nightime sleep.
All NoBlueSpecs™ Clear Lenses are also available as non-prescription lenses for people who need no optical correction, but need to protect their eyes from harmful blue light.
Available as prescription or non-prescription lenses. Therefore they can be used for TV, gaming etc, as well as for the computer, laptops, tablets and smart phones even if prescription lenses are needed.
- Screens out the harmful Blue-Violet light, keeping the eyes completely protected, relaxed, and comfortable as eye-strain is being eased.
- Permits only the beneficial light to pass through
- Maintains clear vision through the lens
- Does not alter colour perception, offering a more natural colour perception
- Reduces stress on eyes caused by constant refocusing
- Comes with the additional properties of anti-static, scratch resistance, anti-reflection and super hydrophobic coating
- All NoBlueSpecs™ Clear Lenses include a UV-400 filter to protect fully against harmful UVA and UVB rays
- Blue Light protected Prescription lenses are available as standard 1.5 and all thinner/lighter lenses. Bifocal and 1.5 Premium Wide Vision Varifocal lenses. We also supply Essilor’s Varifocals, Bifocal, Transitions and XTRActive lenses with Crizal Prevencia blue light protection. Even their very latest X Design Varifocal lenses.
Crizal Prevencia Blue Light protection By Essilor
We sell lots of Essilor lenses with their version of Blue light protection which is called Crizal Prevencia. Without a doubt one of the finest lenses coatings for blue light protection world wide.
Crizal Prevencia by Essilor – Blue Light Protection
Crizal Crizal Prevencia In Essilor’s own words “Maximises the benefits of light, while reducing the risk. UV light from the sun can cause cataracts while blue-violet light is one of the contributing factors of damage to retinal cells. Prevencia also lets in the good light that regulates sleep and mood, and boosts brain activity. Our advanced technology provides the most effective UV protection possible, and filters out harmful blue-violet light, while still allowing beneficial blue-turquoise light to pass through. Crizal Prevencia also has all the other benefits Anti-Scratch, Anti-Reflective, Water/Grease Repellent, Smudge/Dust Proof, Clean Coat.
For maximum daytime protection, adding Crizal Prevencia to Transitions lenses gives 10% more blue light protection.
Bottom line: Daytime blue light from sunshine is good, night-time blue light from LED and CFL is bad
Just because blue light exposure at night has a detrimental effect on health, lack of blue light exposure during the day may be just as bad. During the daytime (when the sun is up), blue light exposure promotes wakefulness, vigour, and vigilance. If you want to be energized and want optimal mental performance throughout the day, blue light is necessary.
Your pineal gland doesn’t need to produce sleep-promoting Melatonin during the day. Blocking blue light during the day may increase your risk of developing depression or fatigue. In fact, those suffering from certain types of depression (e.g. seasonal affective disorder) often benefit from customized “blue light” boxes that produce potent blue light during the daytime.
After sunset, you should be using the aforementioned tactics to minimize blue light exposure such as: screen filters, customized lighting, and blue blocker glasses. Your goal should be to optimize your Circadian Rhythm and prevent exogenous light sources (e.g. from cell phones) from adversely affecting both your physical and mental health. If you want to improve your sleep quality or overcome insomnia – minimizing blue light exposure at night with good quality amber lenses should be a priority.
A superb resource for Blue Light information is: http://www.bluelightexposed.com/#bluelightexposed