Group 1 - The article discusses a comparative test conducted by the Hangzhou Consumer Rights Protection Committee on swimming goggles to help consumers make informed choices [1][2] - The test combined questionnaire surveys and objective testing based on industry standards QB/T 4734-2023, focusing on various performance indicators [1][3] Group 2 - A total of 22 swimming goggles were purchased, including 5 from physical stores and 17 from online platforms, covering popular brands such as Li Ning, 361°, and Decathlon [1][2] - The testing included assessments of appearance quality, optical performance, physical performance, and functionality [1][4][13][14] Group 3 - The optical performance tests included key indicators such as transmittance uniformity, spherical power, cylindrical power, and minimum optical aperture, with results indicating varying performance among brands [5][7][10][12] - The physical performance tests showed that all 22 products met the industry standards, with specific brands like YOTTOY and Arena performing particularly well [13][18] Group 4 - The functionality test focused on anti-fog performance, with several brands exceeding the industry standard requirements [14][18] - Recommendations for consumers include selecting compliant products, ensuring a comfortable fit, and prioritizing anti-fog features [22][23][24]

Core Viewpoint - The Hangzhou Consumer Protection Committee conducted a comprehensive test on 22 popular swimming goggles, providing insights to help consumers make informed purchasing decisions during the summer season [1]. Group 1: Testing Methodology - The comparative test utilized a combination of questionnaire surveys and objective testing to enhance scientific rigor and consumer participation [1]. - Samples were purchased from both physical stores and online platforms, including popular brands like Li Ning, 361°, Speedo, and Decathlon [2]. Group 2: Testing Results Appearance Quality - Most products exhibited good lens material and surface quality, but some had issues like coating defects and hard-to-clean spots, which could impair visibility and safety [5]. Optical Performance - Key optical performance indicators included transmittance uniformity, spherical power, spherical power difference, cylindrical power, and minimum optical aperture. The results showed that the closer the values are to zero, the better the performance [6]. - The industry standard QB/T 4734-2023 requires that the relative deviation of transmittance uniformity should not exceed 15% [6]. - Brands like YOTTOY and Arena performed well in transmittance uniformity for children's goggles, while Arena and other brands excelled in adult goggles [7]. Physical Performance - Physical performance indicators included leakage resistance, pressure resistance, adhesive strength of the sealing ring, bridge strength, and mechanical strength. All tested products met the industry standards [13][14]. Functionality - The test focused on anti-fog performance, extending the evaluation time to 40 seconds beyond the industry standard of 30 seconds. Brands like Zoke and Arena showed superior anti-fog capabilities [15]. Group 3: Recommendations for Consumers - Consumers are advised to prioritize products that comply with the latest industry standards, particularly QB/T 4734-2023, which sets higher requirements for various performance metrics [30]. - A four-step fitting method is recommended to ensure comfort and proper sealing of the goggles [31]. - Emphasis on anti-fog performance is crucial for maintaining clear visibility while swimming [32].