What is Blue Light?
If you’re like us, you spend several hours a day in front of a computer screen or digital device. The problem is that our eyes are not designed to be exposed to blue light emitted by computer screens, phones, and television constantly. This strong blue light causes eye fatigue, dry eyes, blurred vision, headaches - symptoms of digital eye strain also known as Computer Vision Syndrome. Beyond damaging the eyes, exposure to blue light at night disrupts the circadian rhythm that regulates the release of melatonin, preventing us from falling asleep easily and degrading sleep quality.
Why Should I Avoid Too Much Blue Light?
Blue light also known as high-energy visible blue light (HEV) has high frequency and short wavelengths similar to UV light. Prolong exposures to blue light has shown to damage the retina, the part of the eye that detects qualities such as color and light intensity. Because your eyes are working extra hard to cope with the blue light, you begin to experience eye strain. Over sustained periods, the exposure can contribute to long-term vision issues such as cataracts and age-related macular degeneration (AMD).
At night, blue light disrupts our circadian rhythm, the natural release of hormones (melatonin). The blue light tricks our brain into believing that it is day-time, which makes falling asleep more difficult and lowers our sleep quality. Circadian disruption produces serious downstream effects including increase in obesity and depression.