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Sunglasses are a form of protective eyewear designed primarily to prevent bright sunlight and high-energy visible light from damaging or discomforting the
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- In all cases, hiding one's eyes has implications for nonverbal communication;
- Sunglasses can also be used to hide emotions; this can range from hiding blinking to hiding weeping and its resulting red eyes.
- Eye contact can be avoided even more effectively by using mirrored sunglasses.
- They can make eye contact impossible, which can be intimidating to those not wearing sunglasses; the avoided eye contact can also demonstrate the wearer's detachment, which is considered desirable (or "cool") in some circles.
- Sunglasses can be worn to hide one's eyes.
- While non-tinted glasses are very rarely worn without the practical purpose of correcting eyesight or protecting one's eyes, sunglasses have become popular for several further reasons, and are sometimes worn even indoors or at night.
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- One survey even found that a $ 6.95 pair of generic glasses offered slightly better protection than expensive Salvatore Ferragamo shades.
- The Australian Competition & Consumer Commission has also reported that "[c]onsumers cannot rely on price as an indicator of quality".
- A 1995 study reported that "Expensive brands and polarizing sunglasses do not guarantee optimal UVA protection."
- High prices cannot guarantee sufficient protection as no correlation between high prices and increased UV protection has been demonstrated.
- In rare cases, lenses can filter out too much blue light (i.e., 100%), which affects color vision and can be dangerous in traffic when colored signals are not properly recognized.
- However, not every yellow or brown lens blocks sufficient blue light.
- whereas blue or gray lenses cannot offer the necessary blue light protection.
- Regarding blue light, the color gives at least a first indication:Blue blocking lenses are commonly yellow or brown,
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- Lenses of various colors can offer sufficient (or insufficient) UV protection.
- ^
- The lens color is not a guarantee either.
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- sufficiently protective lenses can block much or little light, resulting in dark or light lenses.
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- Depending on the manufacturing technology,
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Avara is the home to some of the most innovative web3 brands: Aave, Lens Protocol, GHO, Sonar, and now Family, all building towards a people powered internet that benefits all.
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Read the genesis post, penned by @lens/stani.
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- Today, we proudly introduce ourselves as Avara.
Avara is the home to some of the most innovative web3 brands: Aave, Lens Protocol, GHO, Sonar, and now Family, all building towards a people powered internet that benefits all.
We're thrilled to announce the acquisition of Family. With Family, led by Benji Taylor, we're reinforcing our commitment to making web3 accessible through world class product design.
Read the genesis post, penned by @lens/stani.
https://avara.xyz/blog/introducing-avara-and-announcing-acquisition-of-family
- As a result, more unfiltered radiation enters the eye.
- Inadequate dark lenses are even more harmful than inadequate light lenses (or wearing no sunglasses at all) because they provoke the pupil to open wider.
- Dark lenses do not automatically filter out more harmful UV radiation and blue light than light lenses.
- It is not possible to "see" the protection that sunglasses offer.
- To protect against "stray light" from the sides, the lenses should fit close enough to the temples and/or merge into broad temple arms or leather blinders.
- The lenses should fit close enough to the face that only very little "stray light" can reach the eye from their sides, or from above or below, but not so close that the eyelashes smear the lenses.
- The only "visible" quality test for sunglasses is their fit.
- and manufacturers often indicate simply that the sunglasses meet the requirements of a specific standard rather than publish the exact figures.
- Several standards for sunglasses (see below) allow a general classification of the UV protection (but not the blue light protection),
- either by the manufacturer or by a properly equipped optician.
- The only way to assess the protection of sunglasses is to have the lenses measured,
- This is due to the eyes being tricked into producing less melanocyte-stimulating hormone in the body.
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- There has been some speculation that sunglasses actually promote skin cancer.
- Sunglasses are especially important for children, as their ocular lenses are thought to transmit far more HEV light than adults (lenses "yellow" with age).
- leading to a recommended minimum of 95% of the blue light.
- which covers most Swiss employees, asked eye experts around Charlotte Remé (ETH Zürich) to develop norms for blue blocking,
- Some manufacturers already design glasses to block blue light; the insurance company Suva,
- before, debates had already existed as to whether "blue blocking" or amber tinted lenses may have a protective effect.
- More recently, high-energy visible light (HEV) has been implicated as a cause of age-related macular degeneration;
- This type of eyewear can filter out UV radiation harmful to the eyes.
- Special eyewear known as solar viewers are required for direct viewing of the sun.
- even during a solar eclipse.