Blue light is part of natural light and has an important effect on our physiological rhythms. However, the blue light emitted by electronic displays is fundamentally different from the blue light found in natural light. Prolonged exposure to this high-energy blue light can aggravate eye strain and even cause various problems. This article will explains the dangers of blue light and the need to block it.  

Understand Blue Light

Blue light is high-energy visible light with a wavelength of 400-500nm, which is divided into harmful blue light with a wavelength of 415-455nm and beneficial blue light with a wavelength of 480-500nm. Anti-blue light glasses are mainly designed to prevent the harmful blue light of the shorter wavelength.

Harmful Effects of Blue Light 

Risk of Eye Disease:Prolonged exposure to high-intensity blue light directly in the eyes can cause damage to the retina. This can increase the risk of retinopathy, including macular degeneration, retinal pigment epithelial degeneration, and more.

Visual Fatigue: When a high percentage of visible light is blue light, it can cause you to strain your eyes. Because blue light has a shorter wavelength and is concentrated in front of the retina, it can cause color aberrations, causing you to use eye adjustment functions at a high frequency.

Affects Sleep:Blue light can affect the quality of your sleep. It stimulates cortisol production and suppresses melatonin secretion to keep you awake. However, too much blue light before bedtime can suppress melatonin production, disrupting your sleep cycle and increasing the likelihood of insomnia.

Using Blue Light Glasses

Using blue light glasses is a relatively simple way to avoid blue light damage to your eyes. First, we need to look at the level of protection of the glasses and whether they are able to filter blue light effectively. Second, we need to consider the comfort of the glasses, since they are going to be with our eyes for a long time. Finally, we need to see if the frame of the glasses matches our aesthetic. If you want to know how to choose eyeglass frames, click on Eyeglass Frames Guide to read it.