Last year saw an influx of new buzzwords. COVID-19 ruled, of course, but it was in good company with \u2018pivot\u2019, \u2018new normal\u2019, \u2018zoom\u2019 and \u2018social distance\u2019. Equally buzz-worthy and a concept that may have hit your radar at a similar time are blue light filtering glasses. Since these are the only buzzworthy concepts from the aforementioned list that we can speak of with authority, let\u2019s take a look into what exactly blue light is and why it\u2019s causing such a stir.<\/p>\n
Blue light is part of the visible light spectrum \u2013 it\u2019s the light we can physically see whereas ultraviolet (UV) and infrared light are outside the visible light spectrum. Light is made up of electromagnetic particles that travel in waves. These waves range in length and strength and emit energy. The length of these waves is measured in nanometres (nm) with 1 nanometre equalling 1 billionth of a metre.<\/p>\n
Blue light comes from both natural and artificial sources. Sunlight is a natural source, while the blue light emitted from digital screens, electronic devices and LED lights is artificial. Blue light has a very short wavelength and as a result produces more energy. Studies suggest that long term exposure to blue light may damage your eyes.<\/p>\n
Sunlight is the main source of blue light and is everywhere. Our bodies use blue light to regulate our natural sleep cycles, otherwise known as our circadian rhythm. Our mood, level of alertness and overall wellbeing can be aided by natural blue light.<\/p>\n
Blue light waves are the shortest, highest energy wavelengths of the visible light spectrum, in turn meaning they can potentially damage the internal structures of the eyes such as the retina and macula. Children are particularly susceptible to these damaging effects since the young eye is less able to filter blue light.<\/p>\n