Most jumping spiders only have green-sensitive and UV-sensitive photopigments in their retinas.

大多数跳蛛的视网膜仅含有对绿色和紫外线敏感的光色素。

And, to throw in a small twist from genetic evidence, there was a study from 2012 that looked at the evolution of photopigments in the eye that detect color.

而且， 从基因证入个转折，2012年有研究探讨了眼睛检测颜色的视蛋白的进化。

Rather than evolving new photopigments, they added an internal filter to some of their green-sensitive cone cells, which cuts out green light and forces those cells to respond only to longer wavelengths like red.

它们并未进化出新的光色素，而是在部分对绿光敏感的视锥细胞入了个内部滤光器，这个滤光器能阻挡绿光， 迫使这些细胞只对红色等更长波长的光产生反应。