Study Debunks Effectiveness of Blue-Light Filtering Glasses for Eye Strain and Sleep Quality

Glasses marketed to filter out blue light may not actually have any significant impact on eye strain caused by computer use or sleep quality, according to new research. A review of 17 trials conducted by scientists at the University of Melbourne, City University London, and Monash University found no evidence that blue-light filtering lenses protect against damage to the retina. The studies did not evaluate this outcome. Blue-light filtering lenses, also known as blue-light blocking spectacles, have become increasingly popular since the early 2000s and are often prescribed or recommended by optometrists. However, the recent research suggests that these lenses may not offer any short-term advantages for reducing visual fatigue or improving sleep quality compared to non-blue-light filtering lenses. The findings also revealed that it is currently unclear whether these lenses affect vision quality or have any long-term impact on retinal health. The review did not find consistent reports of adverse side effects from using blue-light filtering lenses, with any effects being mild, infrequent, and temporary. These effects were also reported with non-blue-light filtering lenses, suggesting they are related to wearing spectacles in general. The researchers concluded that more high-quality, large clinical studies with longer follow-up periods are needed to ascertain the potential effects of blue-light filtering spectacle lenses on visual performance, sleep, and eye health. They also advised people to be aware of the current findings when considering purchasing these spectacles.