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Blueblocker glasses protect the eyes from blue light
Interesting facts about blueblocker glasses summarized for you
Blue light is defined as light with a wavelength of approx. 380 to 495 nanometers (nm). It is short-wave and very high-energy light. It occurs in the natural spectrum of sunlight and is present when daylight is available. Natural light regulates our sleep-wake rhythm via our eyes and is therefore indirectly involved in the regulation of the sleep hormone melatonin. Blue light is therefore not bad per se, on the contrary: it is vital. We need it so that our body can be awake and active. One of the positive effects of blue light is that it lifts our mood and can increase our sense of well-being. It also improves our ability to concentrate and our memory.
High concentrations of artificial blue light are problematic
Blue light becomes problematic if you are constantly exposed to it artificially by working on a screen for hours on end or constantly looking at your smartphone instead of being outside in nature. Other light sources, such as LEDs, energy-saving lamps or your flat-screen TV at home, also emit blue light. The constant exposure to artificial light is not without consequences for the human body, as it affects various areas of the body - from the eyes to sleep. But more on this in the following paragraph.
What are the risks and disadvantages associated with blue light?
There are numerous risks and disadvantages associated with artificial blue light and overexposure. This section describes the problems that too much blue light consumption can cause us.
Problem number 1: Disruption of the natural sleep-wake cycle
As described above, blue light has an activating effect on the human body and wakes us up. This can be beneficial in the morning to get us going. In the evening, however, it is a hindrance because it slows down the production of the sleep hormone melatonin, which naturally makes us tired. This means that blue light really messes up the human biological rhythm. The result is problems falling asleep, sleep disorders and insomnia. Over a long period of time, this leads to hormonal problems, metabolic disorders and reduced resistance.
Problem number 2: Eye fatigue
As already mentioned, blue light is a very high-energy light. As a result, your eyes tire more quickly and headaches can also occur. One of the reasons for this is that the photoreceptors in the retina contain the photopigment melanopsin and are very sensitive to light from the blue spectrum.
Ophthalmologists are aware of the problem. More and more people who are constantly sitting in front of a screen are coming to the practice because they have problems with their eyes. They not only report tired eyes, but also general problems with their vision or that their eyes increasingly feel dry and irritated and they have difficulty recovering.
Problem number 3: Headaches as a result of tired eyes
If you constantly strain your eyes and don't give them a break, you risk headaches as a result. If the eyes can no longer recover and are constantly overstimulated, the head is also affected and reacts with pain, signaling that it urgently needs a break.
Problem number 4: Severe eye diseases leading to blindness
In addition to the comparatively minor eye problems mentioned above, excessive exposure to blue light can also lead to serious eye diseases. These include age-related macular degeneration (AMD) and cataracts. Age-related macular degeneration (AMD) mainly occurs in people over the age of 70. It involves irreversible damage to the retina. In western industrialized countries, AMD is the most common cause of blindness. Unfortunately, constant exposure to blue light can accelerate the process that leads to macular degeneration. Long-term exposure to blue light is also involved in the development of cataracts, which can also lead to blindness.
But what can we do to counteract blue light? It is almost impossible to reduce the amount of time spent in front of a screen if you are working. And although limiting the time spent on your smartphone or tablet is a good idea, it is hardly feasible in reality. Modern devices have a blue light filter. Another option is to wear blue blocker glasses. By this we mean not the transparent blue filter glasses with a special coating that only filters a small part of the blue spectrum, but the dark yellow or orange glasses that block 100% of the blue light.
Which glasses are available to filter or block blue light?
There are now various spectacle lenses that block or filter blue light:
- Blueblocker glasses with orange lenses (our 550 models)
- Blueblocker glasses with yellow lenses (our 500 models)
- Blue filter glasses (transparent glasses)
We explain what the differences are and when which glasses make sense.
Blueblocker glasses with orange or amber lenses
These are the glasses with the darkest tint and therefore have the strongest effect against blue light. These glasses block 100% of the blue light and also partially block green light, which also affects the production of melatonin and therefore the sleep-wake rhythm. Orange-colored glasses have a calming effect on the whole body and are therefore the ideal solution for wearing in the evening or at night. Wearing them can lift your mood, make you feel tired and significantly improve the quality of your sleep.
Blueblocker glasses with yellow lenses
Also yellow lenses block 100% of short-wave blue light and are therefore a real relief for the eyes. Unlike orange lenses, they do not block green light.
Blueblocker glasses with yellow lenses are the ideal glasses for working at a computer screen. They filter out most of the harmful light emitted by the screen, but let enough of it through so that you can still distinguish colors and stay as focused as possible.
Blue filter glasses with clear lenses and a coating
These glasses are advertised as "blue light filtering". The lenses are provided with a coating that is supposed to offer a certain degree of protection against blue light. However, data shows that this coating can only filter a small percentage of blue light.
It is important to take a closer look here: While blue blocker glasses really block blue light and do not allow it to reach the eye, blue filter glasses actually only filter some of the blue light and most of the light still reaches the eyes.
What are the advantages of blue light glasses?
The dark yellow or orange glass absorbs a large proportion of the blue light and prevents it from reaching the retina in the first place. This means that it cannot have any negative effects on either the eyes or the body.
- Advantage number 1: Blueblocker glasses are simple and effective if you no longer want to let blue light from artificial light sources reach your eyes in the evening.
- Advantage number 2: Wearing blue light glasses protects your sleep-wake rhythm and they prevent problems falling asleep or insomnia. Especially if you have to work late in the evening, you should wear blue blocker glasses to prevent blue light from reaching your eyes.
- Advantage number 3: Blue light glasses help make your eyes feel less tired and also less dry or irritated.
- Advantage number 4: Your blue blocker glasses can be a real help in reducing headaches. Often, digital eye strain cannot be reduced because your job requires you to work at a screen. With Blueblocker glasses, you are doing something good for your health and preventing headaches.
What else can you do to protect your eyes?
The less time you spend in front of screens, the better. If you are sitting in front of a screen in the evening, it is important to switch on a second light source. When it is very dark, your pupils dilate and more light hits your retina. If it is brighter in the room, the pupils shrink again.
Our conclusion on Blueblocker glasses
Artificial blue light has become an integral part of our lives. Whether laptop, smartphone, tablet or LED lighting - we are confronted with blue light everywhere and it is unrealistic to believe that the use of these devices will decrease in the future. On the contrary! However, to give your eyes some relief and not disrupt your sleep-wake rhythm in the long term, we recommend wearing blueblocker glasses in the evening. Glasses with a blue filter coating are not effective and cannot replace real blue blocker glasses. Nevertheless, they are useful for screen work during the day, as the massive "blue peak" is reduced.
Further literature on the subject:
- Behar-Cohen F, Martinsons C, Viénot F, Zissis G, Barlier-Salsi A, Cesarini JP, Enouf O, Garcia M, Picaud S, Attia D. Light-emitting diodes (LED) for domestic lighting: any risks for the eye? Prog Retin Eye Res. 2011 Jul;30(4):239-57. doi: 10.1016/j.preteyeres.2011.04.002. Epub 2011 May 14. PMID: 21600300.
- Berson DM, Dunn FA, Takao M. Phototransduction by Retinal Ganglion Cells That Set the Circadian Clock. Science 2002; 295: 1070-1073.
- O'Hagan JB, Khazova M, Price LL. Low-energy light bulbs, computers, tablets and the blue light hazard. Eye (Lond). 2016 Feb;30(2):230-3. doi: 10.1038/eye.2015.261. Epub 2016 Jan 15. PMID: 26768920; PMCID: PMC4763136.
- Renard G, Leid J. Les dangers de la lumière bleue : la vérité ! [The dangers of blue light: True story!] J Fr Ophtalmol. 2016 May;39(5):483-8. French. doi: 10.1016/j.jfo.2016.02.003. Epub 2016 Mar 31. PMID: 27039979.
- Blue light has a dark side, health.harvard.edu
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Liebes Blueblocker-Team, ich habe seit dem ersten Tag Ihre schöne Brille an. Nun habe ich einige Fragen, ob ich es richtig verstanden habe. Ich möchte Sie fragen, wenn ich am Abend also am PC arbeite, trage ich die gelbe Brille. Wenn ich am Abend am Handy bin, sollte ich auch gelbe Brille tragen? Und wenn ich am Abend ein Buch lesen möchte, sollte ich gelbe oder orange Brille tragen? Und sonst einfach wenn ich abends nicht am PC und nicht am Handy bin, dann sollte ich die orange Brille tragen? Wenn ich nach draussen am Abend z. B. jetzt auf einen Weihnachtsmarkt gehe dann sollte ich gelbe Brille tragen, richtig? Am Tag wenn ich am PC arbeite dann trage ich die ComputerBrille (Marke INVU)-sind sie gut, genügt das bitte? Danke für Ihre Antwort und Ihre Beratung. Liebe Grüsse Jana Schumacher
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Lichtblock replied:
Hi Jana, entschuldige bitte die späte Antwort. Grundsätzlich kannst du beide Brillen nach Gefühl nutzen. Erfahrungsgemäß tragen viele Kunden die hellere Variante beim Lesen oder wenn sie unterwegs sind. Tragen solltest du die Brille am besten nach Sonnenuntergang oder 2-3 Stunden vor dem Schlafengehen. Tagsüber solltest du so viel natürliches Licht abbekommen wie möglich. Um am Tag auf eine Blaulichtfilterbrille zu verzichten, empfehlen wir softwareseitige Filter wie f.lux oder iris.co zu nutzen. Die regeln die Farbeinstellungen deines Monitors herunter und wirken dem hohen Blauanteil entgegen. Die dunkle Variante (550) blockt ja noch einen großen Teil vom grünen Spektrum und ist deshalb für einige Menschen sehr gewöhnungsbedürftig. Aber du wirst noch schneller müde. Deshalb wird die Variante von einigen als Knock Out Brille bezeichnet. Beide Gläser erfüllen aber ihren Zweck und blocken 100% Blaulicht! In deinem Fall würde ich also bei den meisten Dingen die helle tragen. Wenn du mal ganz schnell runterkommen willst, greif zu der dunklen. Besten Gruß, Nils von Lichtblock
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