Pecora J L, Brownridge J
J Am Optom Assoc. 1980 Jan;51(1):44-5.
Some ophthalmic lenses are tinted using materials which contain trace amounts of thorium or daughter products of the thorium and uranium chains. Such lenses emit small amounts of ionizing radiation. No tissue damage has been proven as a result of wearing these eyeglasses. Still, any radiation exposure is a potential hazard. Since there are many essentially nonradioactive lenses on the market, tinted lenses containing thorium contaminants would seem to represent an unnecessary risk.
一些眼科镜片使用含有微量钍或钍与铀衰变链子体产物的材料进行染色。这种镜片会发出少量电离辐射。尚无证据表明佩戴这些眼镜会造成组织损伤。然而，任何辐射暴露都是潜在风险。鉴于市场上有许多本质上无放射性的镜片，含有钍污染物的染色镜片似乎带来了不必要的风险。
