Turns out sunglasses also have a shelf life
Do you know the sunglasses can wear all the time?
And everyone's reason for changing sunglasses, most likely it's broken, lost, not fashionable enough
Do you know? Sunglasses also have a shelf life. If it works beyond the deadline. It can also cause damage to the eyes.
How often should sunglasses be changed? The more expensive the sunglasses, the better the sun protection effect?Should I buy a dark or light color?
Today, I'll talk about it for you—The things about sunglasses! The sun protection ability of sunglasses is decreasing year by year
Suggest replacing every 2-3 years
The basic material of the sunglasses lens itself can absorb some ultraviolet rays, and the coating of the sunglasses lens can also reflect some ultraviolet rays. Many sunglasses also add materials that absorb ultraviolet rays to the lenses. In this way, we can turn away the vast majority of ultraviolet rays and prevent them from harming our eyes.
But this protection is not permanent. Because ultraviolet rays carry a high amount of energy, they can cause the material of sunglasses to age, reducing the ability of sunscreen ingredients to absorb ultraviolet rays. The shiny coating on the outside of sunglasses is actually the result of metal vapor deposition, and these coatings may wear out, oxidize, and reduce their reflective ability. All of these will compromise the UV protection ability of sunglasses.
Professor Liliane Ventura and her team from the University of S ? o Paulo in Brazil conducted a study: in Brazil, wearing sunglasses for 2 hours a day leads to a decrease in their UV protection after two years and should be replaced.
Considering the sun exposure situation in our country, experts suggest that depending on the frequency of use, sunglasses should be replaced every 2-3 years.
Now you understand now?
Thanks for reading
Sophie Yang
004@mikeeyewear.com
