Is it necessary to protect against the "blue light hazard" of electronic products in daily life by blue light glasses! Can blue light glasses on the market have a protective effect! Is it necessary to purchase blue light glasses! The impact of blue light on the human body is a mixed blessing.

The harm of blue light is that the human eye has extremely low tolerance to light with wavelengths below 445nm. Long term exposure can cause optical damage to the retina, with blue light energy at 435-440nm being the most concentrated and damaging.

The advantage of blue light is that the 455nm-490nm band of blue light is essential, which can affect the secretion of melatonin by the pineal gland, thereby affecting the biological clock and emotions. Lack of blue light exposure in this band may lead to clock disorders, which is known as non visual biological effects.

Melatonin, also known as melatonin, melatonin, melatonin, and pineal gland hormone, is an amine hormone produced by the pineal gland of mammals and humans, which can make cells that produce melanin shine, hence the name melatonin. It exists in many organisms, from algae to humans, and its levels vary over time every day. The main purpose is to delay aging and improve sleep.

According to the principle of human eyes feeling light, light passes through the lens and reaches the retina for imaging (there are many photoreceptors in the retina, such as cone cells and rod cell). The optic nerve transmits signals to the brain, which is the process of human eyes feeling light.