Lens trimming is a handicraft, of course, there is equipment, lens trimming advocates manual construction, because it is more artistic and temperament. If you are an optical shop, welcome to First Optical Wholesale City. We provide fine-tuning glasses with real Korean technology or direct Korean processing. The first wholesale city of glasses is www.diglasses.com.cn. You can also go to the glasses network to have a look. www.yjbtb.com