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Diagnostic x-ray exposure and lens opacities: the Beaver Dam Eye Study.

B E Klein, R Klein, K L Linton and T Franke

Department of Ophthalmology, University of Wisconsin, Madison 53792.

The Beaver Dam Eye Study is a population-based study of common age-related eye diseases. During the standardized medical history, the 4926 subjects were asked whether they had ever had a chest x-ray, computerized axial tomography (CAT) scan of the head, other x-rays of the head, x-rays of the abdomen, or other diagnostic x-rays. The eye examination included photographs of the lenses of the eyes, which were subsequently graded according to protocol. Nuclear sclerosis and posterior subcapsular opacity were significantly associated with CAT scans. If these relationships are causal, it would highlight the importance of minimizing such exposure to the lens of the eye.

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Beaver Dam Eye Study questioned.

J E Gray
AJPH 1995 85: 414-415. [PDF]  

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