dipos Anti-Bluelight Screenprotector
Blue light is a natural colour of light and a necessary component for the correct representation of colours on displays with LED technology.
During the day, natural blue light increases our attention, responsiveness and mood. However, the absorption of blue light via smartphones and tablets also has side effects such as eye fatigue, dry eyes, sleep disorders and deterioration of vision.
Children's eyes in particular should be protected from the harmful blue light rays from smartphones and tablets. Children's eyes are still developing and therefore much more susceptible to damage from blue light.
As the smartphone and tablet technologies have only been around for a few years and previous generations have not used these technologies, there is no empirical data available. The crucial question, which will probably not be answered for several years, is how much practical damage is caused by blue light. Protect your children and yourself from the blue light rays from your devices with a dipos Anti-Bluelight display protection film.
We would like to explain in detail what blue light is and why you should protect your children and yourself from blue light from your smartphone and tablet with a dipos Anti-Bluelight screen protection film.
The dipos Anti-Bluelight display protection film is basically constructed, cut to size and fit exactly as you know it from dipos display protection films.
It is a crystal clear hybrid glass that you practically do not see during use. We have added an effective blue light filter to this material.The properties of the Anti-Bluelight display protection film at a glance:
- 98% of blue light radiation is filtered (300-400nm)
- Crystal clear transparency, no color changes as with the software blue light filters from the devices
- Scratch-resistant surface (7H at 500 g pressure in pencil test)
- Combines the advantages of glass and plastic, does not shatter
- Bubble-free, antistatic application, can be removed without residue at any time
dipos Hybridglass Anti-Bluelight screenprotectors are currently available exclusively in our Onlineshop shop.dipos.de or on request (by email to firstname.lastname@example.org).
What is blue light?
The blue light describes the natural high-energy and visible light, which is more scattered in the atmosphere than other wavelengths of the visible spectrum, e.g. the colour of the cloudless sky. It is intensively contained in the direct sunlight of the blue day sky.
Blue light adjusts our biological, circadian rhythm (sleep-wake rhythm) to the day and makes us wake up.
If we study more intensively the scientific facts for the regulation of the so-called human biorhythm, blue light influences the effect and interaction of three hormones:
- Melatonin (sleep hormone),
- the serotonin (happiness hormone) and
- the cortisol (stress hormone).
It should be emphasized that blue light actively inhibits the production and effect of the sleep hormone.
Blue light is also found in numerous artificial light sources such as TVs, PCs, tablets, laptops, monitors and smartphones or mobile phones.
Here, however, the human eye does not perceive the blue coloration at all, but perceives the screen light as whitish.
Almost every digital screen now uses LED technology (Light Emitting Diode) for backlighting because they produce brighter light and therefore more colourful images in the more energy-efficient range.
The intensive use of these digital media poses a risk to eyes and body that should not be underestimated.
What damage does blue light cause?
So far, there is limited scientific knowledge about the dangers of blue light, but the experts' concern seems to be growing.
For example, a study last year showed that cultured retinal cells of a laboratory exposed to blue light were completely destroyed.
Under the influence of blue light, free oxygen radicals are produced, which cause oxidative stress in the retina and can cause lasting damage or destruction of the cells.
A study was financed by a lens manufacturer that produces blue light blocking lenses.
Light with a high blue component also influences the hormone balance by reducing the sleep hormone and promoting the formation of the stress hormone.
What can make sense during the day becomes a serious health hazard if there is excessive blue light in the evening and afternoon.
Disturbances in the hormone balance can favour civilisation diseases, such as heart and circulation disorders, immune and metabolic disorders, cancer, diabetes and many more.
The research group led by Christian Cajochen (head of the Center for Chronobiology at the University of Basel) conducted a test with 13 healthy boys aged 15-17 years in the sleep laboratory in front of a blue light enriched LED screen.
The young people wore either glasses with window glass (without any special function) or glasses with a blue filter.
Saliva measurements (in which hormones can be measured) showed that those with blue filter glasses had more sleep hormone in their blood than those without.
Subjectively, those who were exposed to blue light felt more tired and inattentive than those who were protected from radiation by blue filter glasses.
Mariana Figueiro (Lighting Research Center New York), who also examined 13 healthy subjects, came to similar conclusions.
The study by the Lighting Research Center New York showed that two hours of working at a computer screen can reduce sleep hormone production by almost 25%; this is of course not a desirable effect when children and adolescents are supposed to rest in the evening.
- Stress on the eyes
- Dry eyes
- Intense blue light causes damage to the back of the eye - the retina (Dr. Kokkinakis); in children, macular degeneration may start too early (visual impairment)
- Causation of eye damage, such as cataracts and macular degeneration
What damage is caused by blue light, especially for children?
Because children's eyes are still developing, blue light is able to penetrate the retina much more efficiently and directly (i.e. more aggressively).
Dr. Kokkinakis, a researcher in this field, is afraid that unfortunately we will only come to the realization of the serious problem for children's eyes; through the use of mobile phones etc. in a few years.
Tablets and smartphones are already being put into the hands of 2-3 year old children without parents knowing enough about the serious consequences this can have for the health of their children.
Parents would like to create small free spaces for themselves and satisfy the child when going out to eat, shopping and doctor's appointments by giving the small handy "all-rounders" like tablets and smartphones to their children.
As much as the blue wavelengths are of decisive positive importance in daylight because they positively stimulate our attention, reactivity and mood, the artificial blue light of digital devices in the evening or at night has just as catastrophic an effect because it disturbs the circadian rhythm/sleep-wake rhythm already mentioned above.
The closer we hold the devices in front of our eyes to stare intensively at the displays, the less the eye blinks, the more intense the exposure and the higher the risk of possible damage to the eye.
This happens because we open our eyes much wider than when reading a book, for example.
This leads to tense, aching, dry eyes and consequently to headaches.
This also affects many young people, because in the evening, when peace and quiet finally returns, they reach for their tablet or smartphone in bed to "text" friends or send selfies.
The tiredness that has just pressed you into the pillow is lost when reading, wiping and typing.
The blue wavelength of the light that tablets, smartphones and laptops illuminate makes us feel lively.
We don't even notice the blue coloration, but the screen light is perceived as whitish.
This light has the effect of a caffeine effect. The sleep hormone melatonin, the "pointer" of every person's inner clock, is secreted by the pineal gland in the brain in the dark. However, brightness prevents this.
Blue light signals here immediately: Stay awake!!!
Television is regarded as less problematic due to the distance of use.
To ensure good eye health in children, the following things should be considered:
- Use blue light foil for smartphones and tablets
- Let children play a lot of outdoor games to use positive blue daylight and train the distant vision of the eye; more and more myopia (myony) is caused by staring at monitors
- Limit monitor usage (max.1 hours/day)
- Educating children about eye blinking and screen pauses
- Annual eye checks until the age of 18
- 20-20-20 Follow the rule (get up every 20 minutes, look in the distance for 20 seconds and blink your eye 20 times)
Sources and further information
The Daily Telegraph
Your child’s phone and tablet could be harming their eyes, expert warns
Harvard Health Publications
Blue light has a dark side