WHAT IS BLUE LIGHT?
Blue light, also known as high energy visible (HEV) light, is a type of light with shortwave lengths emitting a higher energy. Blue light penetrates deep into the eye, so exposure may result in:
• Digital eye strain
• Suppressing the natural release of melatonin, thus disrupting sleep.
• Damage to the retina exposing the eye to hidden spikes in intensity
• Long-term vision problems such as age-related macular degeneration (AMD) and cataracts
All Render frames are fitted with TAC™ lenses. The Blue light wave length is between 380nm and 500nm, however only wave lengths between 380nm and 430nm are harmful to your eyes. With TAC™ lenses your RENDER eyewear will protect your eyes from harmful wave lengths whilst keep the look and feel of your display intact.
Once your RENDER eyewear is fitted with the clip-on you have a pair of immaculate designer sunglasses, with polarised sun lenses and full UV protection. When you start customizing your clip-ons you can start changing your look as you please. And protect your eyes now and into the future.
Late AMD features vision loss as a result of damage to the macula. There are two types of late AMD – Geographic Atrophy, also called “Dry AMD,” and Neovascular AMD, also called
- Dry AMD involves the deterioration of the macula and the tissue supporting the macula.
- Wet AMD involves the growth of abnormal blood vessels under the retina. These vessels can
leak and cause damage to the macula. While less common, Wet AMD is a greater threat to
vision than the Dry AMD.
A cataract is a clouding of all or part of the eye’s normally clear lens. It is visible to both the individual with the cataract, as it affects their vision, and to anyone who looks at that person’s eye and sees the clouded lens. It will eventually block and distort light entering the eye. Cataracts are usually found in people over age 55, but younger people can have them as well. Symptoms include cloudy or blurry distance vision; altered colour perception; problems with glare; difficulty reading fine print; poor night vision and frequent changes in corrective lens prescriptions. Most cataracts are able to be removed through a surgical procedure, and the vision problem at least partially corrected.
Digital eye strain
Multiple symptoms are reported among them you find that
- 32.6 percent report experiencing eye strain
- 22.7 percent report experiencing dry eyes
- 21.4 percent report experiencing headache
- 22 percent report experiencing blurred vision
- 30.8 percent report experiencing neck and shoulder pain
Disrupted sleep and Blue light (Source: Harvard Medical School)
The health risks of night time light exposure
Some studies suggest a link between exposure to light at night, such as working the night shift, to some types of cancer, diabetes, heart disease, and obesity. That’s not proof that night time light exposure causes these conditions; nor is it clear why it could be bad for us. But we do know that exposure to light suppresses the secretion of melatonin, a hormone that influences circadian rhythms, and there’s experimental evidence that lower melatonin levels might explain the association with cancer.
A Harvard study shed a little bit of light on the possible connection to diabetes and possibly obesity. The researchers put 10 people on a schedule that gradually shifted the timing of their circadian rhythms. Their blood sugar levels increased, throwing them into a prediabetic state, and levels of leptin, a hormone that leaves people feeling full after a meal, went down.
Even dim light can interfere with a person’s circadian rhythm and melatonin secretion. A mere eight lux—a level of brightness exceeded by most table lamps and about twice that of a night light—has an effect, notes Stephen Lockley, a Harvard sleep researcher. Light at night is part of the reason so many people don’t get enough sleep, says Lockley, and researchers have linked short sleep to increased risk for depression, as well as diabetes and cardiovascular problems.
The power of the blues
While light of any kind can suppress the secretion of melatonin, blue light at night does so more powerfully. Harvard researchers and their colleagues conducted an experiment comparing the effects of 6.5 hours of exposure to blue light to exposure to green light of comparable brightness. The blue light suppressed melatonin for about twice as long as the green light and shifted circadian rhythms by twice as much (3 hours vs. 1.5 hours). In another study of blue light, researchers at the University of Toronto compared the melatonin levels of people exposed to bright indoor light who were wearing blue-light–blocking goggles to people exposed to regular dim light without wearing goggles. The fact that the levels of the hormone were about the same in the two groups strengthens the hypothesis that blue light is a potent suppressor of melatonin. It also suggests that shift workers and night owls could protect themselves if they wore eyewear that blocks blue light.