Transmittance Spectrum of Unbranded Sunglasses Using Spectrophotometer

• 作者: Ferhan Esen Hamza Esen Hikmet Basmak Huseyin Gursoy
• 来源期刊: 眼科学期刊(英文)
• 学科: 医学
• 关键词: Sunglass SPECTROPHOTOMETER TRANSMITTANCE SPECTRUM ULTRAVIOLET Radiation VISIBLE Light
• 年，卷（期）: 2015,（1）
• 页码范围: 1-5
• 页数: 5页
• 分类号: R73

摘要

Background: The sunglass standards are not strictly implemented in many countries except Aus-tralia. The purpose of the study was to evaluate the optical properties of unbranded sunglasses for light transmittance. Methods: Unbranded sunglasses with no information about their specifications were included. They were allocated to two groups based on their prices;the ones > 25 US$ (Group A) and the cheaper ones (Group B). Their transmittance spectrum was measured between 190 nm and 900 nm using a double beam scanning spectrophotometer. The European standard for sunglasses was used to evaluate their compliance regarding ultraviolet radiation (UVR) transmittance and minimum requirement for wearing when driving. Results: Thirty-eight sunglasses (Group A = 20 and Group B = 18) were evaluated. Four sunglasses in each group were non-compliant. Percentage transmittance of visible light was <8% in five sunglasses of Group A and in three of Group B, so these were not appropriate to wear when driving. Totally six sunglasses of Group A and five of Group B were non-compliant and/or inappropriate to wear when driving. Conclusions: Based on our findings about their UVR protection and visible light transmittance %, eye care professionals must warn people against the use of unbranded sunglasses without any information about their specifications.