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As we know, there will be an international optics and eyewear exhibition in Paris, French from September 23rd to September 26th. Our company had been invited to this big party. As an owning most recently 3 years experiences of online retailing, we are ready to cooperate with retailers of all sizes to achieve their MAX profit with professionally products and services. Now, before we will introduce our company’s a great variety of eyeglass lenses for your reference.
Standard lens: CR-39 has been the standard material for eyeglass lenses for many years. Lenses made from this material have only a half the weight of glass lenses. In addition, CR-39 eyeglass lenses have better UV light protection. Being less likely to shatter, CR-39 plastic eyeglasses can still be treated with advanced coatings such as scratch-resistant coating. The simplest eyeglass lens, a single vision lens distributes the focus evenly over its surface. CR39 also tends to be a bit heavier and thicker than a Polycarbonate lens of the same prescription would be. If you are looking into buying prescription sunglasses, CR39 might actually be a good idea. It tends to tint, and hold tint better than other lens materials. In fact, most non-prescription sunglasses are made with some type of plastic lenses.
1.61 PC lens: The special variation of plastic is polycarbonate, which features temperature resistance, impact resistance and optical properties. Polycarbonate eyeglass lenses are thinner and lighter than CR-39 lenses. An extraordinary feature of these lenses is that they are 10 times more impact-resistant than glass or regular plastic lenses. Also, Polycarbonate is the lightest, most impact-resistant material made. With an index of refraction of 1.61, polycarbonate is thinner than standard (CR-39 optical resin) optical lenses. Say “goodbye” to the heavy bifocals that put little dents in your nose, and these barely feel like you’re wearing glasses at all. As the safest material available, polycarbonate is ideal for bifocal wearers with an active lifestyle or for those who have one eye that is much better than the other (amblyopia), so your good eye is always protected.
High index lens: A 1.67 Hi index lenses is 40% thinner than Cr39 plastic and works really well in this prescription range. The latest generation of Hi index lenses is 1.71 and 1.74 index lenses. I will often times refer to these as ultra or hyper index simply as a means of differentiating them from the other Hi index materials. These lenses I will generally recommend to people with corrections greater than +/- 8.00. The 1.74 Hi index lenses are nearly half the thickness of the CR39 lenses. If you are one the few people with eyeglass lenses in this range I can tell you that the cosmetic benefits of the 1.74 lenses are astonishing.
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