Underneath is a layer of supporting cells called the retinal pigmented epithelium, or RPE, which nourish the photoreceptors and clean up their waste.

接着下面是起支持作用的细胞层，叫做视网膜色素上皮(RPE)，它给感光层供给营养并清理其废料。

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RPE transplants would only be helpful for people who still have some photoreceptors left to salvage, but one day even people beyond this stage may benefit.

RPE移植将只能帮助那些仍保留部分可利用感光层的病人，但将来病情更重的病人也可能获益。

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Below the RPE are the capillaries that form the retina's blood supply, but between blood and RPE is a thin layer called the blood-retinal barrier.

RPE下面是为视网膜提供血液的毛细管，血液和RPE之间的薄层叫做血视网膜屏障。

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