The camera-type eyes of vertebrates and cephalopods exhibit remarkable convergence, but it is currently unknown whether the mechanisms for visual information processing in these brains, which exhibit wildly disparate architecture, are also shared. To investigate stereopsis in a cephalopod species, we affixed "anaglyph" glasses to cuttlefish and used a three-dimensional perception paradigm. We show that (i) cuttlefish have also evolved stereopsis (i.e., the ability to extract depth information from the disparity between left and right visual fields); (ii) when stereopsis information is intact, the time and distance covered before striking at a target are shorter; (iii) stereopsis in cuttlefish works differently to vertebrates, as cuttlefish can extract stereopsis cues from anticorrelated stimuli. These findings demonstrate that although there is convergent evolution in depth computation, cuttlefish stereopsis is likely afforded by a different algorithm than in humans, and not just a different implementation.

中文翻译：

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墨鱼用立体视对猎物进行袭击。

脊椎动物和头足类动物的照相机型眼睛表现出显着的收敛性，但目前尚不清楚这些大脑中表现出截然不同的结构的视觉信息处理机制是否也被共享。为了研究头足类的立体视，我们在乌贼上贴上了“浮雕”眼镜，并使用了三维感知范式。我们证明（i）墨鱼也进化了立体视（即从左右视野之间的差异中提取深度信息的能力）；（ii）完整的立体视信息时，打击目标之前的时间和距离较短；（iii）墨鱼的立体视与脊椎动物的工作原理不同，因为墨鱼可以从反相关刺激中提取立体视线索。