Introduction of Allyl Ester Resin for Spectacle Lenses by SDK
November 23, 2009 · Filed Under Trendy Products · Comment
Basically the spectacle lenses are classified by their level of refraction factors into three categories of high, medium and low. The higher the refraction factor, the thinner and lighter the lens becomes. The current market demand in Asia, Eastern Europe and Latin America is shifting from glass type lenses to resin type one, and from low refraction ones to medium refraction types. Even in Japan where up to now the higher refraction type lenses have been the main stream demand for medium refraction type lenses is growing thanks to fine balance between the cost and quality of product resulting in an increase in demand for medium refraction lenses at a rate of 20% per year. Read more
