Polarized vs Non-Polarized Sunglasses - Which is Right for You?

In this video, we delve into the world of sunglasses and compare two popular options: Polarized and Non-Polarized. 🕶️ Discover the science behind polarization, its benefits, and whether it's the right choice for your needs. We also break down non-polarized sunglasses and their unique advantages. By the end, you'll have a clear view on which type suits your style and outdoor activities best. Join us to make an informed sunglasses decision!
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As a professional eyewear manufacturer, I'd like to share my perspective on polarized sunglasses. Firstly, polarized lenses are designed to meet the needs of specific scenarios, such as fishing, hiking, driving, and other outdoor activities. When wearing polarized sunglasses, we can better eliminate glare, allowing for clearer vision without being disturbed by reflections. However, there are certain driving situations where polarized lenses might not accurately render road conditions, potentially leading to misjudgments by the driver and incorrect reactions while driving. Nowadays, during long trips, many people rely on navigation systems. When wearing polarized lenses, it can be difficult to see the screen on a smartphone or in-car navigation system, which can be frustrating. Despite these issues, polarized lenses are generally very suitable for driving. However, there's a significant issue with the affordable polarized sunglasses on the market today: most polarized sunglasses under $80 typically use TAC (Triacetate Cellulose) polarized lenses. The advantage of TAC lenses is that they are inexpensive and lightweight, with manufacturers usually opting for 0.74mm or 1.1mm thicknesses. However, the primary material of TAC lenses tends to shrink and deform easily, and the polarized film is sandwiched between TAC layers using water-soluble glue. If the lenses are exposed to seawater or freshwater for an extended period, they can delaminate, rendering them unusable-a problem many consumers have likely encountered. Additionally, because TAC material is prone to shrinkage, manufacturers tend to cut the lenses larger, which can result in the lenses, particularly the 0.74mm thick ones, being severely compressed when fitted into frames. This compression can alter the optical performance of the lenses, causing the prism and diopter values to exceed industry standards significantly. This is why some people may feel dizzy when wearing polarized sunglasses-it's due to these distortions. Moreover, due to a lack of professionalism among some manufacturers, the polarization axis is not always properly aligned during the cutting process. If the polarization axis of the two lenses in a pair of sunglasses is not aligned correctly, it can reduce the effectiveness of the polarization and cause significant discomfort to the wearer. This issue is often found in cheaper polarized sunglasses. On the other hand, materials like CR39, nylon, or glass have much better optical performance compared to TAC lenses, which is why designer brands never use TAC. If polarized lenses are needed, they typically use CR39, nylon, or glass polarized lenses. There's also PC (polycarbonate) polarized lenses, though these are generally used in sports eyewear. Due to cost considerations, most polarized sunglasses under $80 opt for TAC lenses. If you’re considering polarized sunglasses under $40, I recommend avoiding them because the quality of TAC lenses in this price range often comes with many issues from production. So, if you're looking for daily wear and are more focused on fashion and sun protection, non-polarized sunglasses are an excellent choice. However, if you need sunglasses for functional purposes such as fishing or hiking, I recommend choosing polarized sunglasses.