Risk of eye damage from the wavelength-dependent biologically effective UVB spectrum irradiances.

Risk of eye damage from the wavelength-dependent biologically effective UVB spectrum irradiances.
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波长相关的生物有效 UVB 光谱辐照度有造成眼睛损伤的风险。

DOI:
10.1371/journal.pone.0052259
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Liu Y
Liu Y
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Wang F;Gao Q;Hu L;Gao N;Ge T;Yu J;Liu Y

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以前的一些研究已经讨论了宽带紫外线(UV)辐射对眼睛损伤的风险。由于紫外线照射对人体的生物损伤效应是波长依赖性的,因此有必要研究紫外线光谱辐照度的分布。为了量化不同波长的紫外线(UVBE)对眼睛的生物学有效照射量并评估眼睛损伤的风险,在中国三亚测量了紫外线照射量值(北纬18.4度,东经109.7度,海拔18米),使用人体模型和双探测器光谱仪同时测量眼睛暴露和环境紫外光谱辐照度数据以及太阳仰角(SEA)范围(约7°-85°)。本研究使用眼部UV光谱辐照暴露量与光照性角膜炎、光照性结膜炎和白内障的作用光谱加权来计算用于光照性角膜炎(UVBEpker)、光照性结膜炎(UVBEpcon)和白内障(UVBEcat)的眼部UVBE辐照暴露量。我们发现,当夏季眼睛受到的紫外线辐照度为眼睛辐照度的50%时,在30°-60° SEA范围内,眼睛受到的紫外线辐照度最强。在7°-30° SEA范围内,UVBEpker、UVBEpcon和UVBEcat的生物有效波长均在300 nm处。然而,在其他SEA范围中,UVBEpker、UVBEpcon和UVBEcat辐照度的生物高效波长是不同的,分别对应于311 nm、300 nm和307 nm。
A number of previous studies have discussed the risk of eye damage from broadband ultraviolet (UV) radiation. As the biologically damaging effectiveness of UV irradiation on the human body is known to be wavelength-dependent, it is necessary to study the distribution of the UV spectral irradiance. In order to quantify the ocular biologically effective UV (UVBE) irradiance exposure of different wavelengths and assess the risk of eye damage, UV exposure values were measured at Sanya, China (18.4° N, 109.7°E, altitude 18 m), using a manikin and a dual-detector spectrometer to measure simultaneously the ocular exposure and ambient UV spectral irradiance data and solar elevation angle (SEA) range (approximately 7°–85°). The present study uses the ocular UV spectral irradiance exposure weighted with the action spectra for photokeratitis, photoconjunctivitis and cataracts to calculate the ocular UVBE irradiance exposure for photokeratitis (UVBEpker), photoconjunctivitis (UVBEpcon) and cataracts (UVBEcat). We found that the ocular exposure to UV irradiance is strongest in the 30°–60° SEA range when ∼50% of ocular exposure to UV irradiance on a summer’s day is received. In the 7°–30° SEA range, all the biologically highly effective wavelengths of UVBEpker, UVBEpcon and UVBEcat irradiances are at 300 nm. However, in other SEA ranges the biologically highly effective wavelengths of UVBEpker, UVBEpcon and UVBEcat irradiances are different, corresponding to 311 nm, 300 nm and 307 nm, respectively.
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