Cruickshanks K J, Klein B E, Klein R
Department of Ophthalmology, University of Wisconsin, Madison.
Am J Public Health. 1992 Dec;82(12):1658-62. doi: 10.2105/ajph.82.12.1658.
Exposure to sunlight may be a risk factor for the development of cataract. The relationships between exposure to sunlight and to the ultraviolet-B (UVB) component of light and the prevalence of lens opacities were examined in the Beaver Dam Eye Study.
Persons 43 to 84 years of age residing in Beaver Dam, Wisconsin, were examined using standardized photographic assessments of lens opacities. A questionnaire about medical history and exposure to light was administered.
After adjusting for other risk factors, men who had higher levels of average annual ambient UVB light were 1.36 times more likely to have more severe cortical opacities than men with lower levels. However, UVB exposure was not found to be associated with nuclear sclerosis or posterior subcapsular opacities in men. Moreover, no associations with UVB exposure were found for women, who were less likely to be exposed to UVB.
Exposure to UVB light may be associated with the severity of cortical opacities in men. However, the lack of an association in women, the group more likely to have cortical opacities, suggests that other factors may be more important in the pathogenesis of lens opacities.
暴露于阳光下可能是白内障发生的一个危险因素。在比弗代姆眼研究中，研究了阳光暴露以及光的紫外线B（UVB）成分与晶状体混浊患病率之间的关系。
对居住在威斯康星州比弗代姆、年龄在43至84岁之间的人群，使用标准化的晶状体混浊摄影评估方法进行检查。并发放了一份关于病史和光照暴露情况的问卷。
在对其他危险因素进行调整后，平均每年环境UVB光照水平较高的男性出现更严重皮质混浊的可能性是光照水平较低男性的1.36倍。然而，未发现UVB暴露与男性的核硬化或后囊下混浊有关。此外，对于较少暴露于UVB的女性，未发现与UVB暴露有任何关联。
UVB光照暴露可能与男性皮质混浊的严重程度有关。然而，在更易出现皮质混浊的女性群体中未发现这种关联，这表明其他因素在晶状体混浊的发病机制中可能更为重要。
