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.

• CR39 1.499 optical lens.
• CR-39 progressive photochromic gray and brown optical lens.
• Index: 1.56.
• Corridor:14mm or 12mm. 
• Dia.: 70mm or 75mm.
• Get the latest price.
• Supply ability: 3,000 pairs per day.
• Place of origin: Shanghai, China.
• Material: plastic.
• Usage: optical.
• Structure: double convex.
• Shape: spherical.
• UC, HC or  HMC EMI: clear or green.
• Certificate: CE and FDA.
• Packaging details: standard white envelope or box, or your design with your logo.
• Delivery detail: 20 days after deposit.