In the past, tech companies have been accused of being irresponsible as the devices they make emit huge amounts of blue-spectrum light, which affects the body’s ability to sleep.
Prof Paul Gringras, professor of sleep medicine from the Evelina Children’s Hospital in London, was one of the accusers. Two of the biggest names in the industry, Apple and Amazon, have recently announced that they plan to tackle this issue moving forward.
The reason electronic devices affect sleep is the blue light they emit. Our bodies prepare for sleep by releasing the hormone melatonin when it starts to get dark. The wavelengths at the end of the blue-green light spectrum can actually stop melatonin from being produced, making it harder to get to sleep.
Interestingly, prof Gringras’ work has found that each new generation of smartphone and tablet is getting bigger and brighter – emitting more blue light. Studies have shown that being...