央视曝光：部分商家将普通手机膜冒充为防蓝光膜销售，个别防蓝光手机膜效果等于保鲜膜

Core Viewpoint - The effectiveness of "blue light blocking" phone screen protectors is questioned, as many products do not meet the advertised claims of blocking 99% of harmful blue light, leading to potential consumer deception [1][8]. Group 1: Product Effectiveness - Many online and offline retailers promote phone screen protectors with claims of "blue light blocking" capabilities, with prices ranging from 9.8 yuan to 140 yuan [3]. - Testing revealed that some products only block 42.2% to 52.1% of blue light, with others showing rates as low as 0.1% to 16.4% [3][5]. - Some products' blue light blocking effectiveness is comparable to that of household plastic wrap, indicating a significant gap between marketing claims and actual performance [5]. Group 2: Industry Standards and Practices - There are currently no mandatory national standards for blue light blocking phone protectors, with the industry generally referencing recommended standards that suggest a minimum blue light blocking rate of 20% [5]. - The production of effective blue light blocking films requires a combination of coating technology, substrate material, and optical design to ensure user experience, but many products on the market do not meet these criteria [11]. Group 3: Consumer Awareness and Education - Experts suggest that evaluating blue light blocking effectiveness should consider the phone's own light intensity, as a 50% block may still allow harmful levels of blue light to reach the eyes [7]. - The marketing of products claiming to block 99% of blue light is often seen as misleading, as complete blocking would distort color accuracy and visual experience [8]. - Consumers can initially assess the authenticity of blue light blocking coatings by observing color changes under specific lighting conditions [11]. Group 4: Health Implications - Prolonged exposure to high-energy blue light can lead to eye strain and potential retinal damage, particularly in children and adolescents [12]. - Experts emphasize that proper eye care practices, such as taking regular breaks from screens, are crucial for eye health, rather than solely relying on blue light blocking products [14].