“防蓝光”手机膜真有效吗？记者调查揭开真相：个别的效果等于保鲜膜

Core Viewpoint - The effectiveness of "blue light blocking" phone screen protectors is questioned, as many products do not meet the claims made by sellers, with some offering minimal to no blue light protection [1][17][21]. Group 1: Market Overview - Many online and offline retailers promote phone screen protectors with claims of "99% blue light blocking" and other eye protection features [4][6]. - A variety of products were purchased for testing, with prices ranging from 9.8 yuan to 140 yuan, all claiming to have blue light blocking capabilities [7]. Group 2: Product Testing Results - Testing revealed that some products had blue light blocking rates as low as 0.1% to 16.4%, with only a few achieving rates between 40% and 50% [12]. - A specific product tested showed a blue light blocking rate of 42.2% and a light transmittance of 91.2% [11]. Group 3: Expert Insights - Experts indicate that many products do not effectively block blue light, with some performing similarly to household plastic wrap [14][16]. - The effectiveness of blue light blocking is not solely determined by the blocking rate but also depends on the intensity of the light source from the device itself [19][20]. Group 4: Industry Standards and Consumer Misleading - There are currently no mandatory national standards for blue light blocking phone protectors, leading to confusion and misleading claims by some sellers [11][26]. - The industry lacks strict standards, resulting in some sellers misrepresenting ordinary screen protectors as "blue light blocking" products [26][28]. Group 5: Health Implications - Prolonged exposure to high-energy blue light can potentially harm eye health, contributing to eye fatigue and possibly affecting retinal health [29][31]. - Experts recommend managing screen time effectively to mitigate potential eye strain, emphasizing the importance of breaks during prolonged use [33].