metal reader with powerful lens ( diopter: from + 1.00 to + 4.00) each diopter 0.25 per degree distance: 63+ / - 1.00mm
We are specialized Spectacle frames & Sunglasses for years in 1982, stepping in China from TaiWan in 1992. we build up a top-level management and perfect quality control systems, all quality meet....
Metal reader with powerful or minus lens ( each 0.25 per digree) ( diopter from: + 1.00 to + 4.00 ) or ( from -1.00 to -4.00) power distance: 63 + / - 1 mm
semi metal reader with powerful lens. ( power distance: 63 + / - 1mm)