According to MarketWatch, the global market for blue light blocking glasses reached $22 million in 2020 and will likely hit $38 million by the end of 2026. The demand for blue light glasses is certainly there, but do the products make a significant difference for users?
In theory, blue light glasses block the higher-energy wavelengths (blue and purple light), similarly to how sunglasses dim the spectrum and block UV rays.
While there’s a lot of hype about blue-light blocking glasses, the science isn’t conclusive on many of the claims made.
In 2019, Optometry and Vision Science published a study analyzing lenses from seven brands that claim their product blocks blue light.
The lenses tested blocked up to 96 percent of light up to 412 nm, but their effectiveness declined as the light moved into the true blue range at 460 nm. While one brand blocked 73 percent of the high-energy visible light, another brand only blocked only 8.3 percent.
Before purchasing a pair of blue-light blocking glasses, you should do a bit of research into that particular brand to see how much blue light they actually block.
More research needs to be conducted to definitively say whether blue light blocking glasses reduce eye fatigue and minimize disruption to the sleep-way cycle. For now, the American Academy of Ophthalmology recommends trying behavioral strategies to improve sleep rather than purchasing blue light glasses.