What Are the Use, Structure and Functions of Sunglasses?
Summer is approaching and with it the covers are falling, people use every moment of the day to get a dose of fresh air and warmth from the sun. The sun burns down from the sky and in addition to the dazzling brightness, it also brings UV radiation with it. We all love beautifully tinted and fresh-looking skin that is well cared for and protected from carcinogenic radiation.
However, a part of the body is often overlooked that can suffer at least as much damage as the largest organ in our body. The damage often only becomes apparent many years later. We protect ourselves against the blinding light with the colored glasses and adorn ourselves with this often-fashionable accessory for every budget. Liked by some, frowned upon by others, they have long been a useful part of our world.
What are sunglasses?
Sunglasses is a protective from light and UV radiation in the best case before the object on the face worn and bridge of the nose and ears, is supported and held by means of brackets.
Glasses have been providing an obvious service to the human eye for a long time, helping to correct visual acuity or to protect the eye.
Sunglasses are glasses with tinted lenses to protect against brightness and UV radiation. Unlike glasses that correct vision, sunglasses are also worn by people who already have optimal visual acuity. Chanel sunglasses’ demand is increasing drastically all over the world because of their high quality and modern looks. You may check more about Chanel sunglasses here, https://pretavoir.us/collections/chanel-sunglasses.
Shapes & types
Nowadays there are glasses and sunglasses in very different shapes. Whether as a fruit or heart, cloud or circle, oval or square frame with the appropriately cut or pressed glasses, whatever the imagination has to offer can be found on the counter today. Many of these are adapted for fashion and joke more than actual practical use.
Type & purpose
For everyday use, however, a more precise distinction should be made as to the purpose for which the sunglasses are used, as not all of them can be used for everything.
Sunglasses are available for:
- Beach and road needs
- Close to water and mountains
- Sports glasses for activities
- (water, land & air)
- Astronauts with infrared protection
- Work glasses
- Sunglasses clips
- Vision correction sunglasses
- Photochromic glasses
The sunglasses that can be found in every store or at the optician you trust are used for beach and street needs. People suffering from a visual impairment, you can come up with the necessary diopter of myopia and hyperopia and astigmatism (astigmatism determined).
This is where single vision lenses, multifocal lenses or varifocal glasses also differ. Different coatings such as anti-reflective coating, scratch-resistant coatings, UV filters support wearing comfort and safety, as well as the shape of the temples.
Special work glasses such as laboratory glasses, computer workstation glasses or prism glasses that correct visual defects in ophthalmology and the special sunglasses used by astronauts can also be colored. These are either provided by the employer or prescribed by the doctor.
Even with blindness or eye diseases, some wear sunglasses to hide or protect their eyes.
The sports sunglasses
Sports glasses are mostly made of plastic, the lighter, break-proof plastic lenses are also ideal here to reduce the risk of injury. A skin-friendly coating is generally given, as is sports bars, which are intended to prevent slipping.
There are also curved, tinted sun glasses to ensure all-round protection from light and UV radiation, as well as from drafts, splashes of water, dust and stones. For joggers, long-distance runners or similarly active people, good ventilation is also of interest to prevent the glasses from fogging up.
To clamp on
The clip-on sunglasses are a solution for those who wear glasses with diopters, as the sunglasses clip makes the production of second, expensive glasses unnecessary. On the other hand, this increases the chance of additional reflections and less shielding. Alternatively, correction clips with a diopter value are also offered, which can be attached to the sunglasses.
A specialty among sunglasses is the self-tinting glasses. The more UV light hits the thin special coating, the darker the color of the glasses. However, the reaction of the coating slows down after about three years and reacts more and more slowly.
Glass or plastic
Sunglasses with traditional glass lenses are still used, but also those with plastic lenses. Both types have different advantages and disadvantages.
The advantages of plastic glasses are their weight, as they are lighter than mineral glasses, and they are also resistant to breakage. For this reason, plastic lenses are also suitable for children’s and sports glasses, especially since they do not splinter.
Thanks to a refined lacquer, plastic glasses are now scratch-resistant and robust. Another advantage of plastic glasses is that they can be colored in all colors and shades.
The disadvantages here are that they are not as scratch-resistant as mineral glass and are not suitable for higher diopter values.
The advantages of mineral glass are its increased scratch resistance and the possibility of gently merging different areas of vision without unsightly edges. Even with high diopter values, relatively thinly ground glasses are possible, but the disadvantage is that mineral glass is heavier than plastic and can splinter.
Structure, function & effect
First and foremost, sunglasses have a protective function. It should protect our eyes from UV radiation, which we also know to be harmful to the skin. The color of the glasses creates a darkening effect that reduces the eyes from the unpleasant effects of the sun and the body’s own reactions to it.
The sunglasses are ground, tinted and finally coated. In the case of plastic lenses, paint is applied by dipping to make the lens scratch-resistant. However, hardening and anti-reflective layers and UV filters are also applied to a base glass.
All glasses for vision correction are ground into lenses in order to function as best as possible depending on the strength and type of weakness in the sea.