Hi everyone,

Just for your information, I am a student optician and very new to this forum. Please excuse me for any mistake or stupid questions I may raise here!

Recently, I have discovered something myself. Theory said that the Blue Light Coating on Lenses supposed to blocking the Blue UV, and when we use the test pen to test, the blue light should not go through the lenses. I tried the test pen one time and surprisingly see the light go through "Blue Coating Lenses", but not on "Regular Anti-reflection lenses". I do not understand the reason, may some one please explain it to me.

Another question is, just right now in Canadian market, which the brand and type of lenses are the best for Blue Light Filter?

For the Blue blocking, is that just a coating on top of the lenses or The lab actually makes the lenses come with blue blocking already?

Thank you,