Hapivida 10 Set Anti-blue Light Test Card, Professional Eyeglasses Anti Blue Light Test and Blue Light Generator Reusable Card for Eyeglasses Test

• ANTI-BLUE LIGHT TEST: Irradiate the white area of the anti-blue light test card with a blue light generator, the stronger the blue light, the darker the discolouration.
• PRACTICAL AND REUSABLE: The cardstock irradiated by the blue light generator will regain its colour after 1-2 minutes, the anti-blue light test card can be reused, very convenient.
• EASY TO USE: Put the glasses lens on the test card and irradiate the cardboard with blue light generator, quickly test whether your glasses have anti-blue light function.
• SAFE MATERIAL: The anti-blue light test card is made of hard cardboard, which is efficient and practical for anti-blue light test of glasses.
• CUSTOMER SERVICE: If you have any questions about the product you can contact us at any time, we will deal with you as soon as possible.

Specification: Material: Paper Usage: Anti-Blue Light Eyeglasses Test, Detection Blue Light Glasses reusable (repeated use: irradiated test card will automatically recover after 1 or 2 minutes) The stronger the blue light, the deeper the color change Test Card Length: Approx. 8.5cm / 3.3in Test Card Width : Approx. 5.3cm / 2.1in Package List: 10 x Anti-Blue Light Test Card 10 x Blue Light Generator