DearHow are you?we would feel great pleasure to introduce our selves as an importer of all kind of opthalmic lenses and blanks ,here in karachi for psst 21 years ,and we are also working with cross bows optical company ltd for 15 years ,and became its agent in karachi , the reason to write you this email is to get an inquiry about mineral glass progressive lens availblity from your side ,we are very much intrested in mineral progressive lens .and we have a great market here .if you have then please let us know ,via email RgdsSaleemRAINBOW OPTICAL LENS(LENS MASTER)