Sunglasses, a form of protective eyewear prevent bright sunlight and high-energy visible light from damaging or discomforting the eyes. They featuring lenses that are colored, polarized or darkened. The American Optometric Association recommends sunglasses whenever a person is in the sun.to protect the eyes from ultraviolet radiation (UV) and blue light, which can cause several serious eye problems.
Sunglasses offer protection against excessive exposure to light, including its visible and invisible components.
The most widespread protection is against ultraviolet radiation, which can cause short-term and long-term ocular problems such as photokeratitis, snow blindness, cataracts, pterygium, and various forms of eye cancer. Medical experts advise the public on the importance of wearing sunglasses to protect the eyes from UV; for adequate protection, experts recommend sunglasses that reflect or filter out 99% or more of UVA and UVB light, with wavelengths up to 400 nm. Sunglasses that meet this requirement are often labeled as “UV400”.
The color of the lens can vary depending on style, fashion, and purpose, but for general use, red, grey, green, or brown are recommended to avoid or minimize color distortion, which could affect safety when, for instance, driving a car or a school bus.
- Gray and green lenses are considered neutral because they maintain true colors.
- Brown lenses cause some color distortion, but also increase contrast.
- Turquoise lenses are good for medium and high light conditions, because they are good at enhancing contrast, but do not cause significant color distortion.
- Yellow is “optimum for object definition, but creates a harsh visible light”; amber “allegedly makes distant objects appear more distinct, especially in snow or haze. These lenses are popular with skiers, hunters, boaters and pilots”.
- Blue or purple lenses are mainly cosmetic.
Some models have polarized lenses, made of Polaroid polarized plastic sheeting, to reduce glare caused by light reflected from non-metallic surfaces such as water as well as by polarized diffuse sky radiation (skylight). This can be especially useful to see beneath the surface of the water when fishing.
Vision Space embodies many quality sunglasses brands from all over the world. Our centres will carry one or two models of sunglasses that suit your budget and style.
Our qualified optometrists will also be able to advise you on your needs and ensure your requirements are taken care of.
Drop by today into one of our centres to look and try out the latest in sunglasses with personalised services and advise.