List Of Blue Light Blocking Glasses Tester 2023. If the lights are purple or violet then the glasses are not blocking the blue light effectively. One way is to test your glasses is to review their spectrum report.
You can request a spectrum report from your eyewear company. Look at the chart and see how close to black the blue circle (b) becomes.web This product came with a tester card and light, really solidifying my beliefs of its effectiveness.
