Complete Sunglasses Information - HEV, UV400, UVA, UVB & UVC

Blue Light sunrays (HEV) are NOT blocked by UVA/UVB/UVC/UV400 sunglasses

2/11/2021 - Optimized for Firefox 85.0.2

COPYRIGHT 2009 thru 2021 - David Woodsmall

I researched most of this information prior to our 30 day African photo safari

I AM NOT A DOCTOR NOR DO I HAVE ANY MEDICAL TRAINING

NOT responsible for Errors, Omissions, out-of-date Data or ANYTHING

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Complete SUNGLASSES Information - What they should do

Sunglasses should screen out 75% to 90% of viable light. Sunglasses should be dark, but light enough that you can see your eyes in a mirror. Look for a uniform tint, although Double Gradient Tinting (extra tinting at both the TOP and the BOTTOM, can help reduce glare). Sunglasses are marked with a FILTER CATAGORY from 0-4, where 4 is the darkest lens. Being dark does NOT ensure good UV ray blockage. Coatings to block UVA/UVB/UVC rays are COMPLETELY TRANSPARENT - how dark sunglasses are, does NOT effect how well they block Ultra Violet (UV) rays. "UV absorption up to 400nm" = the same thing as "100% UV absorption", which does not Block uv400 NOR BLUE LIGHT (HEV) rays. Sunglasses should block: 1) ultraviolet A, 2) Ultraviolet B 3) Ultraviolet C AND 4) BLUE LIGHT (400-500 nm) I.e, UVA, UVB, UVC and HEV IT WILL BE DIFFICULT TO FIND SUNGLASSES THAT BLOCK ALL FOUR SPECTRUMS. Finding one that also blocks Blue Rays will be the most difficult. Wrap-around sunglasses are recommended (although they do not look as good) Polarization helps with glare (only). Mirror Coatings are good, BUT people will HATE talking to you (can't see your eyes). I wore (2010) HD Vision for the 30 day 6 African Country photo safaris. They fit over my normal sunglasses and added an amber tint to filter Blue Light. NOW (2015) I have amber clipon sunglasses that go over my grey tinted transitions lenses. NOTE - UVA, UVB and UVC blockers are TRANSPARENT and have nothing to do with the lens color. UV bands UVA, UVB and UVC are called Ultraviolet rays, and are NOT visible to the human eye. BLUE LIGHT blocking REQUIRES some form of YELLOW in the lens (my understanding). The closer to the Equator you are AND/OR the LESS OZONE there is (Australia), the MORE you need good sunglasses.

BLUE LIGHT (HEV = 400 to 500 nm) May help Cause Macular Degeneration

New research suggests the sun's high-energy visible (HEV) radiation - also called "blue light" - INCREASES your risk of macular degeneration. HEV rays have longer wavelengths (than UV) - 400-500 nm. Filtering BLUE LIGHT - glasses and Windows computers Sunglasses - Colors for Low Vision - Macular Degeneration Ultra-violet and Blue Light - American Macular Degeneration Foundation Sunglasses For Those With Macular Degeneration FAQ: Age-Related Macular Degeneration - All About Vision Blue Light and Macular Degeneration "It hypothesized that people who have plenty of melanin and don't tend to burn easily are at less risk for macular degeneration than people who burn easily or are bothered by by sun glare." Artificial Lighting and the Blue Light Hazard What color lenses protect my eyes from the blue light? "Yellow, amber, and brown lenses provide the most protection from the blue color light", because yellow blocks the Blue Light - any amount of yellow (yellow, amber or brown) block some amounts of Blue Light - the more yellow, the more it blocks Blue Light. The best all-around sunglass lenses are often gray or bronze/amber. Gray lenses provide the truest color perception while bronze lenses enhance colors and offer good definition and depth perception in bright sunlight - Back-and-Forth Controversy on Blue-Filtering IOLs FAQ: Age-Related Macular Degeneration - All About Vision Best Sunglasses for Macular Degeneration - Low Vision Macular Degeneration: cause, symptoms, diagnosis and treatment Sunglasses and Macular Degeneration, Cocoon Sunglasses, Blue Blocks - WEBrn Blue light inhibits melanin synthesis in B16 melanoma 4A5 cells ... AMDF: American Macular Degeneration Foundation - Ultra-violet and ... "Researchers have identified melanin as the substance in the skin, hair and eyes that absorbs harmful UV and blue light." "By including synthetic melanin in our sunglasses, we may be compensating for the melanin lost as we age." Eye color - Wikipedia UV Ray & Blue Light Eye Protection GLARE (Vision) POLARIZED LENS Sunglasses - Choose Sunglasses that Look Great and Protect Your Eyes "The label should read either UV 400 or 100% UV protection. Sunglasses - Wikipedia How Sunglasses Work BLUE LIGHT - HEV = wavelengths 400 to 500 nm UV400 = UVA and UVB and UVC = wavelengths 100 to 400 nm UV light is broken into three different types: UVA, UVB and UVC. UVA = wavelengths(320-400 nm). Slightly blocked by the Earth's ozone layer. UVB = wavelengths(280-320 nm). Strongly blocked by the Earth's ozone layer. UVC = wavelengths (100-280 nm). Very Strongly blocked by the Earth's ozone layer.

UV400

UV400 Blocks all UV rays from 100 to 400 nm (UVA, UVB plus UVC). BUT THEY DO NOT PROTECT AGAINST BLUE LIGHT (HEV = 400 to 500 nm), which is suspected of being 30% responsbile for Macular Degeneration. eBay Guides - What Is Ultraviolet UV 400 Protection BluBlocker.com HowStuffWorks "Cheap vs. Expensive Sunglasses" How to travel with sunglasses and eyeglasses on an airplane How Do Sunglasses Work? - knowledge for protecting eyes Sunglasses - Wikipedia, the free encyclopedia How Do Sunglasses Really Work? Cheap Sunglasses vs. Designer Sunglasses: Which Offers Better Protection? UV (UVA, UVB & UVC - ONLY) protectant coating DOES NOT have a color (they are clear). Blue Light protectant coating require some YELLOW. DISCOUNT GLASSES, reading your prescription, how to measure, etc.

OTHER RELATED INFORMATION

AFRICAN TRIP HEALTH ISSUES AFRICA Africa - Traveler's Health Information BITES - Treating & Identifying BluBlocker BLUE LIGHT may cause Macular Degeneration Botswana - Travel Information DEET DEET Sellers of GPS - Complete Information about GPS HEV, 400 to 500 nm (rays longer than UVA, UVB, UVC & UV400), may cause Macular Degeneration Insect Repellents & Killers KENYA - Travel Information that you Really MUST Know LYME Disease LYME DISEASE IN SOUTH AFRICA MALARIA - Prevention, Prophylactics & Information MALARONE - Malaria Prophylactic - RECOMMENDED Mefloquine Metofluthrin MOSQUITOES, REPELLENTS & INSECTICIDES - Complete Information about Mosquito Netting Mosquito (electrified) Zappers (swatters) Netting OFF Clip-on mosquito protection Periprel Permethrin PICARIDIN - repellent Poisoning by DEET Poisoning by Insecticides Poisoning by METOFLUTHIN Poisoning by PICARIDIN (not very likely) Poisoning by PYRETHRIN Prophylactics / Malaria Preventative Medications RID - Mosquito & FLY repellent South Africa - Travel Information Zambia - Travel Information Zimbabwe - Travel Information

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