Research tells us that blue light can damage the retina and increase the risk of macular degeneration. But too much exposure does more harm than good.Īlthough the cornea and lens of the eye block UV rays, they don’t stop blue light from reaching the retina. At levels of 455-500 nm, it can help to boost alertness, improve our cognitive function and enhance our mood. While blue light tends to have a bad reputation, sometimes it is actually beneficial. Interestingly it is thanks to blue light that the sky looks blue too!
Blue, because of its short wavelength, is the shade that has the highest energy source. Visible light contains a range of wavelengths that are separated into different colour bands. However, artificial sources of blue light could be playing havoc with your body clock, keeping you alert and awake at night, when you want to be winding down. As the sun comes up the blue light triggers us to wake up, while once the sun goes down and blue light levels drop we start to feel sleepy.
However, many people do not even realise that it could be the cause of sleepless nights and tired, stained eyes.ĭespite the fact that modern lights, TVs, computers, mobile phones and tablets all emit blue light, the sun is actually the main source of blue light for most people. In today’s technology-driven society overexposure to blue light is a common problem.
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