BlockBlueLight - NightFall Taylor in Black

Blue light is a type of high-energy visible (HEV) light that is emitted by the sun and by digital devices such as smartphones, computers, tablets, and televisions. It has a shorter wavelength and higher energy than other types of visible light, which makes it more damaging to the eyes and more likely to cause eye strain and other vision problems associated with digital screen use. Exposure to blue light can also disrupt our natural sleep-wake cycles by suppressing the production of the sleep hormone melatonin, making it harder to fall asleep and stay asleep at night. Therefore, it is important to protect our eyes from the harmful effects of blue light, especially when we spend significant amounts of time in front of digital devices.

Blue light is emitted from both natural and artificial sources. Natural sources include the sun, which emits high amounts of blue light, and the blue sky, which is a result of the scattering of blue light by the atmosphere.

Artificial sources of blue light include digital devices such as smartphones, computers, tablets, and televisions, as well as LED and fluorescent lighting used in homes, offices, and public spaces. Blue light is also emitted by gaming devices, e-readers, and even some alarm clocks.

While blue light exposure is necessary for regulating our natural sleep-wake cycle and mood, excessive exposure can have negative effects on our eyes, brain, and overall health. Therefore, it's important to take steps to reduce our exposure to blue light from digital devices and artificial lighting, such as using blue light filtering glasses, reducing screen time before bed, and adjusting the brightness and colour temperature of our screens.

Melatonin (the sleep hormone) is produced by our brains which makes us fall and stay asleep. Darkness causes the body to produce melatonin, which causes sleepiness, that signals the body that it is time to sleep. Exposure to blue and green light at night suppresses the release of melatonin as it signals your brain that it is still daylight, trying to keep you awake and alert. Reduction in melatonin makes it hard to fall asleep and/or stay asleep, drastically lowers sleep quality, and causes serious sleep disruption. Quality sleep is essential for maintaining a healthy body and mind.