立体视觉 stereoscopic vision

互联网2013-11-14

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亦称实体视觉。用双眼视看到的立体物体，虽然物体的网膜象本身是平面的，但在感觉中枢内由于心理作用，却被感觉为立体（立体感）。这被认为是基于双眼视差的存在以及单视界外的物点被复视的结果。单眼视虽然在某种程度上也可判断出远近和深度，但双眼视时，即使不转变视线，只消一瞥便可感觉到立体性。仅用具有某些视差的两眼网膜象的融合才能产生立体视觉的这一事实，可由立体镜（stere－ oscope）得以证明。

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