![]() ![]() The danger of constant exposure to blue light throughout the day has been a topic of study for many years, with eye strain and disturbances to natural sleep patterns the chief reasons why people have increasingly turned to blue light glasses.īlue light, having the highest energy output of the visible spectrum, is poorly absorbed by the eye. Artificial lighting that you may come across in indoor spaces, and other sources such as LED screens on devices such as laptops and smartphones, have become an almost inescapable feature of our lives. Blue light is everywhere around us, now more than ever. In fact, sunlight just happens to be the largest source of blue light that most of us are exposed to, but this isn’t the whole story. This light is invisible, but contains enough energy for plants to photosynthesise and to give us a tan with enough exposure. Dial this energy even further and you’ve got ultraviolet (UV) light. Blue light, on the other hand, has shorter wavelengths and contains the most energy. In fact, stray too far into the red and you’ll find infrared light – with wavelengths so weak that they aren’t visible to the human eye. On the red end of the spectrum, the wavelengths are longer, which means they contain less energy. If you have ever witnessed the well-known physics experiment of refracting sunlight through a prism, you will have seen how white light splits into the different bands of colours that make up the visible light spectrum.Įach of the colours that make up this spectrum contain different wavelengths of energy. Blue light is just one part of this visible spectrum, which when combined with red, orange, yellow, green, indigo and violet, make white light – the kind we see in sunlight. Our eyes are constantly working to interpret the visible spectrum of light. Just what benefits do these blue light glasses offer the wearer, and what are the real effects of blue light on the eyes? We’re setting out the facts to help you make an informed choice about whether blue light glasses are right for you. ![]() When it comes to preventing eye strain and fatigue, do blue light filter glasses really work? Blue light glasses, which are glasses with special lenses that are designed to filter out blue light, have seen a surge in popularity in recent years as wearers seek to mitigate eye strain, increase focus and even get better sleep at night.
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