Please enter a valid keyword with 2 or more characters / numbers.
Some links on this website may take you to other third-party sites and you acknowledge and agree that HKTDC and the HKTDC Affiliates have no responsibility for the accuracy or availability of any information provided by those linked websites.
Links to other websites do not constitute an endorsement by HKTDC of such websites or the Information, products, advertising, or other materials available on those websites.
Displayed is a progressive photochromic optical lens that has an index of 1.56. Made of high quality plastic, this optical lens is light and durable. This optical lens has a spherical shape and a double convex structure.