There are three motivations to wear sunglasses. The first excuse for why is really self-evident! If you don’t want bright sunlight in your eyes, the dark surface of the sunglass lenses shuts out bright light and makes the world darker (but not your mood!) The second, is for style – everybody wants to look great! The third, which is the most compelling reason, is that the sun’s ultraviolet light can be destructive in the long haul, bringing on different kinds of issues with your eyes, including visual impairment (at worst, blindness) and melanoma, a form of cancer.
Ocular Melanoma is now one of the top causes of people losing an eye in Australia. That alone should be a good reason for us all to protect our eyes with good quality sunglasses, and your kids should wear them too!
Good sunglasses provide protection, as their lenses filter out most of the harmful UV rays. Good quality sunglasses provide UV400 protection from the sun’s harmful rays. It pays to check what the UV rating is when buying sunglasses as there are ratings for UV protection (the higher the number, the better protection you will be giving your eyes).
So how do they work? The darkening effect is a very simple one: looking at the world through tinted lenses makes it seem darker to you – even thought the effect is really just an optical illusion, it can help you if exposure to bright sunlight tends to give you a headache or cause you to squint (less squinting also means less crow’s feet around your eyes!)
The UV separation is more complex. UV filtering lenses are coated with special chemicals that allow light to pass through them, but reflect away UV. UV rays are basically high-frequency light waves, which means that the chemical structure has to be formulated to deflect light while allowing through lower frequency light. This is tricky science, and the materials needed to do it are expensive.
The most complex sunglasses are prescription sunglasses with polarizing lenses. They not just protect your eyes from light and UV, but also incorporate corrective lenses. These lenses combine the technology for ordinary corrective lenses to be tinted, laminated with a polarizing layer, and covered with UV reflecting materials. When all these facets are combined, glasses are transformed to sunglasses that not only cut out harmful UV rays, but also provide a more intense view of colors (due to polarization), and they correct your vision!
High quality sunglasses are available from Naked Specs – [ https://www.optical4u.com/] All sunglasses feature UV400 polarised lenses, and prescription sunglasses are also available. Other eyewear products include prescription glasses online, reading glasses and designer glasses frames.