环境近紫外线辐射与白内障

Environmental near-UV radiation and cataracts.

作者信息

Zigman S

机构信息

Department of Ophthalmology, University of Rochester School of Medicine and Dentisty, New York, USA.

出版信息

Optom Vis Sci. 1995 Dec;72(12):899-901. doi: 10.1097/00006324-199512000-00008.

DOI:10.1097/00006324-199512000-00008

PMID:8749337

Abstract

This report compares sunlight UV-A and UV-B fluxes in the Northeastern United States that reach the crystalline lens with thresholds that cause lens damage. The fluxes of UV-A and UV-B radiation that reach earth to penetrate the cornea and to reach the lens were calculated. Ten hours of continuous UV-A exposure or 23 min of UV-B would exceed the rabbit cornea threshold for photokeratitis. The lens threshold would be reached by 26 h of UV-A or 245 h of UV-B continuous exposure. The sequence of UV-induced damage follows: (1) UV-B photokeratitis; (2) UV-A photokeratitis; (3) UV-A lens damage; and (4) UV-B lens damage.

摘要

本报告比较了美国东北部到达晶状体的阳光中紫外线A和紫外线B通量与导致晶状体损伤的阈值。计算了到达地球并穿透角膜到达晶状体的紫外线A和紫外线B辐射通量。连续10小时的紫外线A照射或23分钟的紫外线B照射将超过兔角膜光性角膜炎的阈值。连续26小时的紫外线A照射或245小时的紫外线B照射会达到晶状体阈值。紫外线诱导损伤的顺序如下：(1)紫外线B光性角膜炎；(2)紫外线A光性角膜炎；(3)紫外线A晶状体损伤；(4)紫外线B晶状体损伤。