实验证据显示 ,根据局部浓度、定位 (细胞外相对应于细胞间 )和 /或状态 (结合状态或自由基状态 )锌对细胞功能具有正性或负性作用。视网膜中锌浓度尤其高 ,它提示锌在组织中的关键作用。还有证据提示 ,人体缺锌可导致异常黑暗适应性和 /或与年龄相关的黄斑变性。本文的目的在 Experimental evidence shows that zinc has a positive or negative effect on cell function depending on the local concentration, location (extracellular phase corresponding to intercellular) and / or state (bound or free radical state). The zinc concentration in the retina is particularly high, which suggests a key role of zinc in the tissues. There is also evidence that human zinc deficiency can lead to abnormal dark adaptation and / or age-related macular degeneration. The purpose of this article is