Both polarized and non-polarized sunglasses have their own characteristics and benefits. The choice between them depends on your needs and personal preferences. Here's a description of each type:
Differences between polarized and non-polarized sunglasses:
Non-polarized sunglasses:
Non-polarized sunglasses are conventional sunglasses that block the intensity of visible light. These sunglasses reduce overall glare and protect your eyes from the sun's harmful UV rays. They are effective at providing basic protection from the sun's rays and are suitable for outdoor activities such as walking, running, or driving.
Polarized sunglasses:
Polarized sunglasses also block bright light and UV rays like non-polarized sunglasses, but they offer an additional feature. These sunglasses have a special filter that reduces glare caused by light reflected off flat surfaces, such as water, ice, snow, or asphalt. By eliminating glare, polarized sunglasses improve visual clarity and increase contrast, which can be especially helpful when doing outdoor activities in bright environments or when participating in water sports.
So, in short, if you frequently find yourself in environments with intense glare, such as beaches, lakes, or snow, polarized sunglasses can be an excellent option for reducing glare and improving visibility. However, if you're only looking for basic sun protection without worrying about glare, non-polarized sunglasses may be sufficient. Remember that, regardless of the type of sunglasses you choose , make sure they offer adequate UV protection.
Categories of polarized lenses:
There are different categories of polarized lenses, classified according to the amount of light they allow to pass through. The classification of categories may vary slightly depending on the manufacturer, but the following categories are generally used:
- Category 0 : These polarized lenses allow 80-100% of light to pass through. They are suitable for low-light conditions, such as cloudy days or dusk. They do not offer intense sun protection and are mainly used for aesthetic purposes or to block blue light in everyday situations.
- Category 1: These lenses allow 43-80% of light to pass through. They are suitable for moderate light conditions, such as partly cloudy days. They offer light sun protection and are ideal for outdoor activities in low-light environments.
- Category 2 : These lenses allow 18-43% of light to pass through. They are suitable for medium light conditions, such as sunny days. They provide moderate sun protection and are suitable for most outdoor activities.
- Category 3 : These lenses allow 8-18% of light to pass through. They are suitable for bright conditions, such as very sunny days. They offer strong sun protection and are ideal for outdoor sports, such as cycling or skiing.
- Category 4: These lenses allow less than 8% of light to pass through. They are suitable for exceptionally bright conditions, such as high mountain environments or very sunny and reflective surfaces like water or snow. They provide intense sun protection and are commonly used in high-altitude sports.
It's important to note that category 4 polarized sunglasses are not suitable for driving, as they can be too dark and reduce visibility under normal driving conditions. Furthermore, category 4 polarized sunglasses may have legal restrictions in some countries due to their darkness. Always check local regulations and recommendations before choosing polarized sunglasses.
Would you like to know if your sunglasses are polarized or not? It's very easy and fun to check. Watch this video.