Blue light filtering glasses have gained popularity in recent years as a means of reducing eye strain caused by computer work and improving sleep quality. However, a new review by researchers from the University of Melbourne, City University London and Monash University suggests that these glasses may not be living up to expectations. The study is published in the journal Cochrane Database of Systematic Reviews
The review, published in the Cochrane Database of Systematic Reviews, analyzed data from 17 randomized controlled trials from six countries. The purpose of the studies was to evaluate the effects of blue light filtered lenses compared to non-blue light filtered lenses on visual performance, retinal protection and sleep quality.
The results of the review indicate that there is no evidence to support the effectiveness of blue light filtered glasses in reducing eye strain during computer work or improving sleep quality. In addition, the studies did not evaluate whether these lenses actually protect the retina, which is a critical factor in eye health.
Associate Professor Laura Downey, senior author of the review, emphasizes the lack of short-term benefits of blue light filtered lenses compared to lenses without blue light filtering. She also notes that it is currently unclear whether these lenses have any effect on quality of vision or sleep-related outcomes. In addition, no conclusions can be drawn about the potential impact on long-term retinal health.
It is important to consider the quality and duration of the studies when interpreting these findings. Although the review adhered to strict Cochrane Institute methodological standards, the short follow-up period of the patients did not allow assessment of possible long-term outcomes.
Dr. Sumir Singh, first author of the review, emphasizes the need for high-quality, large-scale clinical trials with longer follow-up periods and more diverse populations. These studies should examine whether efficacy and safety outcomes differ between different groups of people and different lens types.
While glasses that block blue light may have some benefits, such as reducing exposure to blue light from digital devices, this review suggests that they may not be effective in relieving eye strain or improving sleep quality. Consumers should consider these findings when deciding whether to purchase such glasses.