Contact lenses for back marked poker, is invisible. When you wear it, just like wear nearsightedness contact lenses, others could not know you wear something. And we do the mark on the back of poker by special ink, without the contact lenses, you can see nothing, while you are wearing the lenses, you can see the mark clearly.

   In order to see the marks clearly, we suggest you that use the under the fluorescent lamp. If you want to use it under the sunshine, please tell us advance, cause the poker should be processed specially.

   Product Characteristic:
     Diameter: 13.8
     Center thickness: 0.04 mm
     Center wideness: 5mm, 7mm, 9mm
     Base curve: 8.6
     Water content: 42%
     Material: HEMA
     Obtained FDA\ISO9001\EN46001 Such as a number of international quality system certification. And a number of product patents, Manufacturing technology patent, Grinding patent, Known as artificial cornea.