Regarding blue light, the color gives at least a first indication: Blue blocking lenses are commonly yellow or brown whereas blue or gray lenses cannot offer the necessary blue light protection. However, not every yellow or brown lens blocks sufficient blue light. In rare cases, lenses can filter out too much blue light i.e., 100%, which affects color vision and can be dangerous in traffic when colored signals are not properly recognized.
Just as the name indicate, the blue light blocking glasses can prevent you from blue light which emitted from electronic device such as smartphone, computer and tablets. The blue light will harm your vision and affect your sleep quality.
Blue light blocking glasses is especially designed to block the blue light emit from sunshine and digital devices such as computers, tablets , smartphones and television. Blue wavelengths are the most potent portion of the visible electromagnetic spectrum for circadian regulation. Therefore, blocking blue light could create a form of physiologic darkness. Because the timing and quantity of light and darkness both affect sleep, evening use of amber lenses to block blue light might affect sleep quality. Mood is also affected by light and sleep; therefore, mood might be affected by blue light blockade.