Do clear lenses block blue lightHow do I know if these glasses really block blue light
First of all, we need to be clear why we need to block blue light and what kind of blue light we need to block.
1. You can google anti-blue light and use your glasses for comparison. Our glasses can block about 20% of harmful blue light.
2. Not all blue light can be blocked. Blue light is divided into harmful blue light and beneficial blue light. Harmful blue light refers to the high energy blue light with wavelength of 385nm-445nm. Beneficial blue light refers to blue light with wavelengths between 446nm and 505nm.
3. The blue light substance contained in harmful blue light will damage the tissue structure of the eye, directly penetrate the lens into the retina, causing the retinal pigment epithelial cells to atrophy or even die. The death of photosensitive cells will lead to vision loss and headaches affecting sleep.
In our daily life and work, we spend almost two-thirds of our time every day facing large and small screens. Unknowingly, our eyes suffer from damage, soreness, dizziness and glare .....
But many people do not know the cause, or even ignore the eye discomfort, which eventually leads to vision loss. In fact, it is the ""blue light"" emitted from the screen that affects our eyes, making it difficult to see the small movements behind