Use the blue light torch to beam the blue light test card directly, the test card has turned blue.
Use the blue light torch to beam the blue light test card through TIJN Blue Light Blocking Lens.
We can see that part of test card beamed by the torch has turned blue, and the part shaded by TIJN Blue Light Blocking Lens has not turned blue.
What you can get
Anti eye fatigue, more concentrate on working and learning.
Minimized the headache and enjoy a good sleep for a whole night.
Protect your eyes from daily life and electronic products.