We’ve heard many stories of people who worry about their vision, often feel visual strain in front of the computer, and decide to wear a special pair of glasses. Actually, we are often offered an anti-reflective coating every time we buy a new pair of glasses. But this anti-glare technology is not the same as blue-cut. The former is meant to reduce light reflections in the surface of the lens, and you will find this evident if you use them in a sunny and bright day or in front of your computer. In contrast, blue light glasses are meant to block a very specific range of wavelengths in the visible spectrum of light. In other words, it blocks blue light from entering your eyes without causing major alterations in your capacity to distinguish color.
But why would you want to cut blue light or a significant portion of it from the visible spectrum? Let us review the reasons why this technology is becoming a new trend in the optical industry, as well as the scientific and anecdotical evidence of their application.
The rationale behind blue light and blue light glasses
There is blue light almost everywhere we go, especially if we live a modern digital life looking at many screens and devices all day long. The sunlight is also a source of blue light to a certain degree, but the majority of blue light exposure comes from smartphones, televisions, laptops, and tablets, which now populate our day-to-day.
According to a 2018 survey, it was reported that the average worker spends around 6 and a half hours sitting in front of their computers, every day. And the screen use statistics have a rising trend, because back in 2015, 21% of Americans reported being online constantly, and this trend increased at 28% in 2018.
Both digital overuse and blue light from these screens can cause significant eye strain. That’s why people feel dizzy or may develop a headache after using the computer for a very long time. The majority of us have experienced this moment when we need to take a break, put the eyes away from the computer, and gently press with our fingers to relieve tension. Sometimes, the symptoms are rather subtle, affecting our capacity to focus, and making us feel discomfort and tiredness throughout the day.
This is not something new, and most of us have had the sensation, at least once or twice, and even if we are not using the computer all the time.
True, blue light does not cause retinal damage, like some brands have advertised, but it may contribute to eyestrain and significant wear of the visual function. That’s why blue light glasses are made. They block a wavelength of light that is apparently causing these problems with modern technology, allowing us to use our devices at work or at home without considerable eyestrain.