Why it is important to protect your eyes from UV-A and UV-B rays
UV rays (ultraviolet rays) are a form of radiationone electromagnetica naturally present in sunlight. They are divided into three categories based on their wavelength: UV-A, UV-B and UV-C.
- UV-C they are the shortest and most energetic, but they do not reach the earth's surface as they are filtered by the ozone layer of the atmosphere. UV-A and UV-B, however, are able to reach the earth's surface.
- GRAPE they have a longer wavelength and penetrate deeply into the skin, while the UV-B they have a shorter wavelength and cause more sunburn. Both can cause damage to the skin and eyes if exposed for long periods of time without protectionone appropriate.
It is important to protect yourself from UV rays by using sunglasses and sunscreen with protectionone UV, especially during the hours of greatest exposureone solar.
What causes exposure?one Prolonged UV in our eyes?
The exhibitionone prolonged exposure to UV-A and UV-B rays can cause various damage to the eyes.
In particular, the UV-B can cause keratitis (inflammationone of the cornea), conjunctivitis (inflammationone of the transparent membrane that covers the internal surface of the eyelids and the white part of the eye) and photokeratitis (a sort of sunburn on the cornea). The exhibitionone repeated long term to UV-B can also contribute to the development of cataracts (opacity of the lens of the eye) e degenerationone age-related macular disease (AMD), which is a common cause of vision loss in older adults.
- UV-A can cause premature aging of the retina, increasing the risk of cataracts and AMD. Furthermore, UV-A can also damage the external surface of the eye, causing inflammationone of the conjunctiva and iris.
For this reason, it is important to protect your eyes from exposureone to UV rays by using sunglasses with lenses that filter UV-A and UV-B and wear them even in indirect or covered sunlight conditions.
Which lenses to choose to protect your eyes from UV rays
To protect your eyes from damage caused by UV rays, it is important to choose sunglasses lenses that have good protectionone UV. When purchasing sunglasses, it is important to check that the lenses have a label or descriptionone which indicates the percentage of UV filtering.
Good quality lenses must have one prosthesisone 100% UV for both categories of rays UV-A and UV-B, which means they absorb all harmful UV rays. The polarized lenses they can also be useful for reducing glare and improving visual clarity in bright light conditions, such as light reflected off snow or the surface of water.
It is important to choose quality lenses so that they protect your eyes from UV rays and do not limit your visionone or cause eye strain. Additionally, you may consider using colored lenses, which can improve visionone contrast and reduce eye strain in certain situations, for example in bright light or foggy conditions.