Aisheny Blue Light Test Card Paper - 50Pieces for Anti-Blue Light Glasses Lens Testing | Perfect for Eye Protection, Screen Time Monitoring & Digital Device Safety

Product Description

Feature:Function: This test card is specially designed for testing blue light proof glasses.Material: The card is used with blue light torch, easy and convenient to use.Advantages: Can be used repeatedly, irradiated test card will resume after 1-2 minutes.Features: Includes 50pcs in the packaging, meeting your different need.Uses: Perfect tool in sunglasses shop, or you can just use at home.å±å¼€æ”èµ·Specification:Condition: 100% Brand NewItem Type: Blue Light TestQuantity: 50PcsTest Method:1. Turn on the test torch, aim at the card test area, the card turns blue and purple.2. Put the anti-blue light glasses in the test area. It will not change color when exposed to the lens, and the blue and purple will be blocked.Result Judgment: the stronger the blue light is, the deeper the discoloration will be in the test areaPackage IncludingPackage List:50 x Blue Light Test Card