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有大量的研究指出，大熊猫的嗅觉和听觉非常发达，但是视力很差，大熊猫的视力指数在0.32左右，按照人类的标准，它们都是800度的大近视。由于大熊猫长期生活在密密的竹林里，光线很暗，障碍物又多，用进废退，致使其目光变得十分短浅，只能看清几米之内的物体。虽然看不清，但并不会影响大熊猫在野外的生活和很多野生动物一样，大熊猫在寻找食物和判断风险时，首先用到的都是它们灵敏的嗅觉和听觉。大熊猫的双眼外面各有一个用来吸收阳光，避免紫外线刺激眼睛的黑眼圈，黑眼圈和几乎没有眼白的眼球看上去就像一个整体，所以显得眼睛很大。它们进化出了像猫一样可变化的瞳孔，可以调节明暗度。所以我们最喜欢的熊猫黑眼圈根本不是卖萌用的，这是为了保护眼睛，黑眼圈可以大限度地将光线吸收，进入眼睛的光线就少了。
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