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Digital devices fit so naturally into our daily lives that it's easy to forget how "unnatural" it is for our eyes to work, read and play from a digital display for hours. With the increased use of digital devices, we are exposed to more blue light overall from both natural and artificial sources.
Natural blue light is all around us. It's what makes the sky look blue. Natural blue light regulates your sleep and wake cycles. It also boosts alertness, elevates your mood, and increases feelings of well-being. Artificial blue light can also be found in things like computers and flat screen televisions, LED lights and energy-efficient light bulbs.
Within the visible light spectrum, blue light has a shorter wavelength and higher energy, which is harder for our eyes. Because these waves are shorter, they appear to flicker more than longer, weaker wavelengths. Flickering is the flashing effect that happens when the LED backlight controller of a monitor adjusts the brightness levels during display refreshing. This causes eye fatigue without you even noticing.
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Our eyes have natural filters but they're not enough to protect against the over-exposure of blue light. Our skin, nails, hair and eyes all contain melanin, the body's natural "sunscreen" which absorbs UV and blue light rays. But as we age, we lose melanin; by around age 65, half of our natural protection is gone. That makes our eyes more susceptible to damage from both UV rays and blue light which can more deeply penetrate the retina contributing to macular degeneration.
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More than half of U.S. adults – 60 percent – spend a minimum of six hours a day, every day on phones, tablets and computers, so it's important to practice good habits to keep your eyes safe from blue light. Because we use our electronic devices so regularly, we are gradually being exposed to more sources of this light for longer periods of time.
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Nearly 70% of adults who use devices regularly and who experienced symptoms of digital eye fatigue didn't do anything to ease their symptoms. Why? Because they didn't know they had it.
Computer eye fatigue symptoms are very common, and also very treatable. Schedule an eye exam to make sure you're doing everything you can to protect your eyes from blue light computer eye fatigue.