First of all, we really appreciate all of you visiting us at UNITED VISION CORP.We offer the most complete and technically advanced optical and ophthalmic products. We develop, manufacture and distribute various types of hight-quality lenses & instruments CR-39, Middle-Index, Hi-Index, Super Hi-Index, RX Lenses Auto Patternless Edger, Refractor Keratometer, Digital Lensmeter, Double Tubing Chart Projector, Motorized Digital Phoropter and more ophthalmic products. Most of our products are manufactured in accordance with the requirements of the quality standards of ISO certificate FDA/CE approvals and being exported to 20 or more principal countries in Asia, America, Europe, and Africa under the good reputation for our products' superiority. For more detailed information about our products, please contact our local office in your area or visit the company's website at www.uvco.netThank you