Seven reasons to wear sunglasses 1. When the eyes are exposed to strong sunlight, the cornea absorbs most of the ultraviolet rays, which can cause keratitis and conjunctivitis. 2. If UV exposure to th...
Why Polarized Sunglasses Are Essential for Your Outdoor Adventures When it comes to outdoor adventures, having the right gear can make all the difference. Among the essentials, a good pair of sunglass...
1. Resin lenses: a type of lens made of organic materials CR-39, scientific name Dially Glycol Carbonates, is the most widely used material for producing ordinary resin lenses. It was discovered by ch...