One of the main issues people encounter before purchasing sunglasses nowadays, is the popular question of: what is the difference between polarized and non-polarized lenses?
There are many different theories as to what a polarized lens offers its wearer; therefore, we decided to help our ShadesDaddy current and future customers with their decision making before placing an order by clarifying the actual facts against the myths.
First important fact: UV protection – A vital reality most people are unaware of is the fact that when using sunglasses, the pupil widens. Consequently, allowing UV rays to enter the eyes easier. If a lens offers poor UV protection, sun rays may damage the eyes permanently causing macular degeneration which leads to vision loss and cataracts. However, when purchasing polarized lenses that is one risk the consumer will never have to worry about because they offer 100% protection against UVA and UVB rays.
Another valuable benefit they offer is almost complete protection against the sun’s horizontal glare, making the reflection of the sun almost unnoticeable for a clearer more defined vision. The intensity of the emission of sun waves is much higher than the scattered ones. Thus, making this kind of light harmful for the eyes and especially for those who are driving. The polarized lenses are used to block this intense light that is reflected from flat surfaces. The reason for this is that polarized sunglasses are made with vertical polarization, while the light reflected by the sun on flat surfaces is horizontally polarized.
The non polarized lenses have a dark shade and reduce the intensity of light. However, unlike the polarized lenses, they cannot counter the effects of horizontal polarization. These lenses do not take into account the direction in which light is coming.
However, even though polarized lenses improve visibility and provide better protection, they have some disadvantages. In some cases, polarized lenses may reduce the visibility of images produced by liquid crystal displays (LCD) screens such as cell phones, GPS devices found on cars and boats and other flat LCD screens.
Regardless of its very few inconveniences, whether you are someone who’s constantly active under the sun, driving, jogging or simply laying under the sun, polarized sunglasses are definitely the better choice when purchasing new shades!