Anti-blue light glasses, like this rain boot. We have been bombarded by too much propaganda about anti-blue light glasses lenses. Brands always have a rhythm, which makes us focus on the protection principle of substrate absorption/film reflection, how much blue light protection is, and what the background color is, but we overlook the most important and fundamental optical performance as a pair of lenses - clarity!

The anti-blue light glasses lenses with substrate absorption can be seen to have the lowest transmittance, as the yellow index YI value is also significant on a colored background.

No matter how the anti-blue light lenses are designed, since specific blue light needs to be blocked, the transmittance cannot be much higher! So as long as it's anti-blue light lenses, the clarity is definitely not as good as regular lenses of the same level! Just like the waterproof lever in the rain boot advertisement, it is completely waterproof below the knee! Add velvet inside to keep you warm and cool! When you wear it for a few days and the stinky feet come out, you realize that these shoes are not breathable at all! Wearing it for too long will make your feet stink! Wearing anti-blue light lenses for a long time is more likely to cause visual fatigue than regular lenses! Should be your second pair of glasses, only worn for specific occasions!