The truth about blue light-blocking glasses: Do they really work?
A review of 17 randomized controlled trials suggests that blue light-blocking glasses do not effectively reduce eyestrain caused by looking at computer screens. The study found that these glasses have "probably little or no effect" on vision quality and an "indeterminate" effect on sleep quality. While there is no evidence to suggest that blue light exposure from screens causes retinal damage or eye diseases, symptoms of eyestrain arise due to decreased blinking and dry eyes. The review concludes that blue-light glasses may not be worth the purchase for healthy adults. However, the studies included in the review had limitations, such as small sample sizes and short durations, which may have affected the ability to observe long-term benefits.