Provide more contrast and protect from AMD



100% UV and Blue light absorbtion from 290 nm, to 535 nm in your dye pot or Microwave in a few minutes

You can still tint CR 39 lenses to to a full absorbtion absorbtion range of 100 % right in your office at very little cost. And then you can also tint them over to the following colors.
in the colors as below:
Blue - Blocking Dyes available in 4 different Colors
amber.......brown......chocolate brown.........dark green



see all of it at: ===========>
http://optochemicals.com/blueblocker.htm