Awasome How To Know If Glasses Have Blue Light Blocker Ideas. The first quick test you can try is to just hold the glasses up to a light. Yes, blue light blocker glasses do work.

The resulting graph (called a transmittance spectrum report) reveals to the smallest nanometer which wavelengths are being filtered, and at which intensity. These products decrease the transmission of ultraviolet light involving wavelengths.web If the lights are purple or violet then the glasses are not blocking the blue light effectively.




