The Science of Sunglasses

The Science of Sunglasses

Sunglasses at gasoline stations or dollar stores feel a bit flimsy, but a lot of people still buy them. It usually costs $1 to $2. Stickers on these glasses usually have “Ultraviolet 400 Protection” stickers on them. If you ask eyepiece professionals if they would trust these sunglasses to filter out Ultraviolet light, they will just simply say no because they are too cheap to have quality materials that can filter out the sun’s radiation. The cheapest sunglasses you can find on the market today that have “real” UV ray protection capabilities is $100.

The sun is not a friend

While most people enjoy the warmth of the sun’s infrared rays provide, its UV light, although it is unnoticeable and invisible, is pretty dangerous. The total amount of light people are exposed to is affected by how high individuals are relative to the sea level, how much time individuals spend under the sun, how high the sun is, the amount of pollution in the atmosphere, as well as whether or not they are taking photosensitizing medications (drugs that help increase the body’s rays absorption).

To know more about infrared rays, click here for more info.

And while the sun can hit the eyes in a straight line, the gleam is also reflected on the ground and can reach the eyes from the sides and below. Some eye problems correlate with UV light exposure, from cancerous growths on the eyelids to snow-related blindness to issues affecting the back of our eyes.

A kid’s eye is usually pretty sensitive to light exposure. Their lens is still clear, and their pupils a lot wider. It means that two to five percent of the sun’s radiations received by the kid’s eyeballs can reach the retina. If you compare it with an adult individual aged 25 years old and above, it is between one and two percent.

And there is a blue gleam. Between ultraviolet and green-colored light, there is a high-energy region of visible spectrum that have been involved in common forms of age-related vision problems, although studies are still ongoing. People need to protect their eyes from these gleams. How can they do that?

Casting light on eyepieces

There are useful protection people can use when it comes to eyepieces or sunglasses.

UV protection – Sunglasses advertise as having UV 400 will help block almost all of the sun’s rays. It is in reference to the 400 nanometers wavelength. And if people are concerned that eyepieces like Saint Laurent Sunglasses are not enough to block the sun’s radiation, they can check out with professionals, and they will use a service to find out if it can protect their eyes or not. If it goes up to 390, it still protects your eyes, but it will not block UV 100%. The protection itself does not decrease or lessen over time, even though the tint could fade.

Price – While people may think that expensive sunglasses are better at protecting the eyes from UV radiation that is simply not true. According to recent studies, the sunglass price is not a guarantee that it will have better-protecting capabilities. It has no real bearing on its ability to filter out gleam, but it has a significant role to play when it comes to the clarity of visible lights being transmitted.

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