Diurnal Variation of Ocular Exposure to Solar Ultraviolet Radiation Based on Data from a Manikin Head
Diurnal Variation of Ocular Exposure to Solar Ultraviolet Radiation Based on Data from a Manikin Head
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DOI：
10.1111/j.1751-1097.2012.01094.x
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发表时间：
2012-05-01
影响因子：
3.3
通讯作者：
Liu, Yang
中科院分区：
文献类型：
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作者：
Gao, Na;Hu, Li-Wen;Liu, Yang
在中国三亚（18.4 ° N，109.7 ° E，海拔18 m）进行了测量，以研究眼睛暴露于紫外线（UV）辐射的日变化。实验装置由人体模型和双探测器光谱仪组成，用于同时测量眼睛和环境紫外数据。顺时针旋转实验装置以模拟三种不同类型的暴露。当人体模型面向太阳时，夏季眼睛暴露于紫外线辐射的双峰分布。UVA和UVB的最大眼紫外线辐照度分别出现在太阳高度40度和50度左右。在特定波长下测量光谱辐照度，获得光性角膜炎、光性结膜炎和白内障的眼部生物学有效紫外线（UVBE）辐照度，并计算同一时间点的紫外线指数（UVI）进行比较。当人体模型面向太阳时，最大的眼睛UVBE辐照度值是在太阳高度角处获得的，其中UVI值为8。这项研究的结果表明，户外活动期间防止眼睛过度暴露的措施不仅应该在中午采取，而且应该在其他时间采取。
Measurements were conducted at San Ya, China (18.4 degrees N, 109.7 degrees E, altitude 18 m) to investigate the diurnal variation of ocular exposure to ultraviolet (UV) radiation. The experimental apparatus was composed of a manikin and a dual-detector spectrometer to simultaneously measure ocular and ambient UV data. The experimental apparatus was rotated clockwise to simulate three different types of exposure. When the manikin was facing into the sun, the ocular exposure to UV radiation on a summer day was bimodally distributed. The maximum ocular UV irradiance occurred at solar elevations of around 40 degrees and 50 degrees for UVA and UVB respectively. The spectral irradiances were measured at specific wavelength to obtain the ocular biologically effective UV (UVBE) irradiances for photokeratitis, photoconjunctivitis and cataract, and the UV index (UVI) was calculated at the same time point for comparison. When the manikin faced the sun, the maximal ocular UVBE irradiance values were obtained at the solar elevation where the UVI value was 8. The results of this study showed that protection against ocular overexposure during outdoor activities should be taken not only at noon but also at other times.