The first time you put on progressive glasses, the center of the lens looks sharp and the floor appears flat, but any quick glance to the side smears the world into a soft streak....
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PC lens is also called “space lens”, “universe lens”.Its chemical name is polycarbonate which is a thermoplastic material (the raw material is solid, after heated and molded into the lens,it is also solid), so this kind of lens product will be deformed when heated too much, not suitable for high humidity and heat occasions. PC lenses have a strong toughness, are not broken (2cm can be used for bulletproof glass), so it is also known as safety lenses. With a specific gravity of just 2 grams per cubic centimeter, it is the lightest material currently used for lens. The weight is 37% lighter than ordinary resin lens, and the impact resistance is 12 times that much an ordinary resin lens!
The first time you put on progressive glasses, the center of the lens looks sharp and the floor appears flat, but any quick glance to the side smears the world into a soft streak....
READ MOREWho Should Wear Progressive Lenses: The Short Answer Progressive lenses belong on the face of anyone who needs three working distances in one frame and is willing to give the desi...
READ MOREA 63-year-old machinist picks up his first pair of progressive lenses. Two weeks later he comes back with a strange complaint: straight ahead, everything is crisp, but every time ...
READ MOREA woman in her late forties holds a restaurant menu at arm's length, gives up, and asks the person across the table to read it aloud. Three months later she is sitting in a fittin...
READ MOREA 52-year-old office manager reads a spreadsheet on her monitor, glances at the printed invoice in her hand, then looks across the room at a colleague walking in. Three distances,...
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