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Blue Light Spectrum


The Bad and The Good of Blue Light

We like the highest quality for the lowest cost. Business executives are look for the most efficient set up, for the lowest cost. The current market for computers calls for higher detail, better picture quality, and lower cost. All new technology has unintended benefits, or consequences. Blue light, and its effects, have only recently been taken seriously by the medical community. Its effects are widespread. However, one hundred years ago, this condition was completely unknown. In order to understand how to treat the side effects of blue light, we need to start at the beginning.

The Visible Spectrum

The light that reaches out to the human eye is separated into visible light, which is comprised of wavelengths that range from 380 to 780 nm, as well as non-visible light comprised of UV light (ultraviolet ranged light) and IR light (infrared ranged light).
 
UV light is capable of negatively impacting biological tissue, like our eyes and skin. As such, we need to be careful and keep ourselves protected from sunlight by wearing sunglasses, a hat, and suntan lotion.
Visible blue-violet light is capable of hurting your eyes. While blue-violet light doesn’t have as much energy as ultraviolet light does, it’s completely unfiltered upon reaching the retina. In comparison, the eye’s frontal area fully absorbs ultraviolet light, although less than 5% of it can reach the retina.
 
The blue light wavelength between 380 and 500 nm is known as high-energy visible (HEV) light. Blue-violet wavelengths within 380 and 440 nm are likely damaging and have been linked to one of the possible causes of damage to the retina caused by high-energy incident light.

The Positives and Negatives of Blue Light

How much blue light is enough? When should we protect ourselves from it?
There is an ongoing debate about the pros and cons of blue light. Some argue that blue light can be a beneficial utility in fighting seasonal depression and insomnia. By contrast, blue light is capable of long-term damage to the human eye.
What is the truth about blue light, though? Have there been any modifications to artificial light that we endure each day? How do our bodies respond to the biological effects of this wavelength? When and how should we keep our bodies protected from the blue light’s effects? Keep reading to discover the facts about blue light.

Advantages of Blue Light
Light isn’t just necessary to help us see. It’s also a vital aspect of controlling our biological rhythms and impacts our overall well-being. Light plays a role in our alertness, our concentration, and our productivity. It’s what regulates our health and energy.
Research confirms that light has a biological effect on our bodies. For instance, ultraviolet light stimulates vitamin production. Bright light exposure, specifically blue light, impacts our hormonal balance. Body hormones control how an individual feels, in addition to their sleep-wake cycle. Blue light portions are ample in daylight and substantially minimized in the evening.
The happy hormone, serotonin, as well as the stress hormone, cortisol, are released by the body when it’s bright out. These hormones are what make us feel active and lively. Melatonin is a sleep hormone and stimulates fatigue. It also helps us get a good night’s rest when it’s dark outside.
Blue light goes as far as the retina and influences our psychological well-being. As such, light therapy is often used to treat insomnia and seasonal depression. However, it should be used in moderation. Too much exposure to the light can be risky and cause long-term damage.

Negative Impact of Blue Light
The human eye can be damaged by excessive light in the blue-violet and ultraviolet bands. In addition to the cornea and conjunctiva becoming painfully inflamed, the crystalline lens of the eye (e.g. cataracts) may also be damaged, and the retina is susceptible to macular degeneration. Therefore, it’s vital to keep 100% UV protected sunglasses on when the sun is shining strong, particularly in areas where there is an abundance of glare, like on a ski slope or near the water.
 
Modern-Day: Sources of Light with A Large Blue Light Proportion
Whether it’s xenon light, LED (light-emitting diode) light, energy-saving bulbs, or electromagnetic screen radiation, there are some alternative light sources intended to improve our lives, yet also come with a bigger blue light proportion than older conventional light bulbs. Each light’s spectral composition is the result of our exposure to more blue light than necessary.
Keep in mind that an hour spent outdoors on a regular overcast day exposes our eyes to 30 times more blue light than an hour spent indoors facing a screen.
 
Clear Lenses with a Blue Light Filter
  Traditional clear spectacle lenses don’t warrant UV protection if they are mainly worn indoors. That said, it is feasible to obtain clear lenses with a blue light filter like EXYRA lenses. This is because blue light radiation from screens or light sources can tire or irritate the human eye. Blue filters offer individuals better vision; the individual visible light wavelengths are refracted in unique ways by the crystalline lens and the cornea, so they don’t all strike the same retina’s focal point. For example, for many people, it’s simpler to see red clearly from afar and blue close up. Green, red, and blue lines are more troublesome to maintain in focus in comparison to shaded lines with similar colors.
Many people learn that sources of light with a large blue light proportion may make them feel excessively restless at night time. When we are outdoors at night or dusk, or even if we’re in a dark room, our eyes change to a unique vision mode. The human eye transfers to the high-energy blue spectrum in low light. As such, we see blue light more extremely, which our eyes interpret as heightened glare. Drivers will understand this effect better than anyone as an incoming car’s glaring headlights often blind them, particularly ones with LED or modern xenon headlights. In such circumstances, blue light filtered spectacle lenses can produce more comfortable vision.
  The EXYRA glasses comes with a filter that attenuates blue light in the 380 to approx. 450 nm band. As such, enhanced visual comfort is offered for those who desire protection from blue light while performing activities indoors (without the loss of a blue light’s effects in the 450 to 500 nm band). EXYRA glasses can be worn at any time of the day as much as you want., as we provide 100% UV protection as well.
 
How Digital Devices are Altering our Vision
Mobile devices and digital displays have changed the light spectrum we are accustomed to. They are also modifying the way we behave visually. We spend a lot of time looking at screens up close. Low background brightness can be problematic among kids: "school myopia" refers to the rising propensity of youngsters who are shortsighted upon beginning their education.
If we’re not looking into the distance as much as we should be, our eyes won’t get the time they need to relax. As such, our eyes unlearn how to focus fast for numerous distances. This results in our eyes being strained digitally. Further, we don’t blink as much organically when we’re looking at digital screens, so our cornea doesn’t become moistened as often by tear fluid. This may result in strained, fatigued eyes. It might even impair your vision.

Suggestion: give your eyes breaks more often by looking into the distance more frequently, even when you’re in the middle of working on your computer, smartphone, or tablet. Ensure you receive enough exposure to brightness while keeping your eyes protected with EXYRA eyewear from a surplus of blue-violet and UV light.