131-6075 Skyper Safety Glasses 98% Blue Light Blocker Safety Glasses STC-ORANGE UV Extreme Anti-Fog Lens Black Frame, Wrap Around Style Side Protection Uvex HoneyWell #S1933X CSA Z94.3 (2 OR 6 PAIRS/BOX)

• Orange Lens features Spectrum Control Technology (SCT) to absorb over 98 percent of blue light emitted from laptops, computers, iPads etc. SCT absorbs select wavelengths of radiant energy into the lens.
• Result is additional screen contrast with sharpened details, which improves focus, reduces eye fatigue and helps inhibit vision problems like cataracts and age-related macular degeneration
• 3-Position ratcheting lens inclination system and patented, adjustable-length Duoflex comfort cushioned temples for optimal screen viewing; molded-in nose bridge for long-wearing comfort
• Wrap-around uni-lens design with integral side shields offers exceptional clarity; Uvextreme anti-fog coating; easy and economical lens replacement system
• Meets ANSI Z87 plus and certified to CSA Z94.3; made in the U.S.A; Lens Width 142mm, Temple Length 130 to 145mm, Temple Set-back 100mm
• Item Weight 45.4 g     Product Dimensions 6.9 x 17.8 x 5.6 cm
  

3 Blue Blockers Put to the Test from Consumers Report

Light from smart gadgets can keep you awake, but these eyeglasses are meant to guard against that

The full spectrum of visible light is often described using the colors of the rainbow: red, orange, yellow, green, blue, indigo, and violet. The LED screens of TVs, computers, smartphones, and video games produce lots of blue light.

Exposure to high levels of that light close to bedtime can suppress the production of the sleep-promoting hormone melatonin by the brain’s pineal gland, says Charles Czeisler, M.D., chief of the Division of Sleep and Circadian Disorders at Brigham and Women’s Hospital in Boston. That’s why he and other experts advise that it’s best to avoid staring into computer screens and smart phones 2 or 3 hours before you hit the pillow.

Blocking the Blue Light

For those who can’t—or won’t—unplug in the evening, several companies offer blue blockers, which are glasses that filter out the wavelengths in the blue part of the spectrum. A small 2014 study of Swiss teen boys in the Journal of Adolescent Health found that those who wore blue blockers while using a computer in the few hours before bedtime were significantly sleepier than the boys who wore clear lenses.

That could be because the glasses “are trying to suppress the intensity of the tremendous amount of blue light emitted from computer screens,” Czeisler says. “The screen you see glowing would actually look like a floodlight” if the human eye were capable of perceiving those wavelengths of blue-enriched light, he says.

Still, he cautions that for blue blockers to offer substantial benefit, they need to block almost all blue light. In addition, he says more research needs to be done to prove that people who wear blue blockers actually fall asleep faster.

What We Found

1. Gunnar Intercept Gaming Glasses
   
2. Spektrum Pro Blue Light Blocking Glasses
   
3. Uvex Skyper Safety Glassess
   

We tested three pairs of glasses in our labs for their ability to block blue light, measuring light intensity at all wavelengths to find out how much each lens absorbed. Of the three, only one—the Uvex Skyper safety eyewear (orange tinted)—cut out almost all blue light.

The Gunnar Intercept gaming glasses (medium yellow), US $53, cut blue light by about half, and the Spektrum Pro Blue Light Blocking Glasses (light yellow), US$40, cut it by only about a third.

Note that none of the blue blockers claim to be medical devices (intended for use in the diagnosis or treatment of a disease or condition) and aren't regulated by the Food and Drug Administration.

UVEX has developed a comprehensive family of task-oriented polycarbonate lens tints, employing Spectrum Control Technology (SCT®). This technology incorporates unique dyes, designed to absorb select wavelengths of radiant energy into the lens. These dyes manipulate light to reduce a spectral hazard or to provide distinctive filtration for specific viewing tasks. SCT lenses provide an added value for safety spectacle wearers that encounter visual hazards or viewing challenges in their work environment. While the primary need for eye protection is often impact hazards, many work applications also include radiation hazards including ultraviolet, infrared and visible glare.

In the case of SCT-Orange, the tint is designed for use in the dental industry or in other industries where UV lamps are used for curing materials such as paints or inks. As the chart below demonstrates, SCTOrange offers a wide range of spectral protection. It absorbs >99.9% of potentially harmful UVA and UVB radiation. It further provides protection by completely absorbing visible light up to 540nm, which includes violet, blue and certain green wavelengths of light which are emitted by curing lamps. 

Another benefit of SCT-Orange relates to eye fatigue. Visible light in the violet and blue areas of the spectrum is not well focused by the eye. When these colors are filtered out, contrast is improved, and the eye finds it easier to see detail. A good example of this is amber sunglasses that are used by pilots and sportsmen to reduce haze and glare. As with all personal protective equipment, it is the employer's responsibility to conduct an on-site or workplace hazard assessment.