【狗狗冷到是什么症状】狗真的是色盲吗？事实证明，这是狗眼中的世界。

不少人误以为小狗的世界只有黑白。事实上，与人类相比，狗的色觉非常有限，但可以看到蓝色和黄色等颜色。但是狗的视角比人类有几个优点。例如，在黑暗中可以看得更清楚。大卫亚设，Northern Exposure(美国电视新闻)你知道狗怎么区分颜色吗？一起看狗眼中的世界吧。

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狗的视觉和人类的视觉有什么区别？

your eyes pick up color using a type of cell called cones in your retina . the same is true for dogs，though our cones aren ' t exactly the same

人类的眼睛通过视网膜的视神经细胞感知颜色，狗也一样，但两者的视神经细胞并不完全相同。

Humans have three types of cones，' which enables us to see different shades of red，blue-violet，and green，' says Alison me

科罗拉多州立大学教授、兽医博士和兽医艾莉森梅丹说，人类有三种锥体细胞。"所以我们可以看到各种深浅的红色、青色和绿色."

dogs have two types of cones that pick up blue-violet and yellow shades、says Lara sypniewski、dvm和a professor of small animal media

据俄克拉荷马州立大学小型动物医学教授、兽医临床医生LARA SIFNIPSKIY称，狗有两种视锥细胞，可以区分蓝紫色和黄色。

this means that dogs see in a similar way to humans who are red-green color blind。they don ' t see red or green and they see everything in E and yellow，' says Jay ne itz，PhD，a researcher and professor of ophthalmologsor

这意味着狗的视觉与红、绿、色盲相似。华盛顿大学眼科教授、研究员杰伊内茨博士说：“狗看不到红色或绿色，但蓝色黄色色调的颜色都能看到。”

humans may have the advantage in color vision，But dogs definitely have us beat in the realm of night vision . this is because de

人类在色觉方面可能有优势，但狗的夜视能力显然比人类强。涅茨说，这是因为狗的眼睛比人的眼睛更集中。

a dog ' s retina is largely composed of cells called rods、which can sense light、even in very low-light conditions和says sypnies

据西夫尼夫斯基说，狗视网膜主要由湿婆细胞组成，即使在光线较弱的情况下，湿婆细胞也能感知光线。

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对狗视力的冷知识

dogs are especially good at sensing movement。the increased number of rods in the dog ' s retina also increases their ability to detect moto Sypniewski says . this ability can help them detect small

狗特别擅长地壳运动。西夫尼夫斯基说。"狗的视网膜上有很多湿婆细胞，因此观察运动的能力更强。"这种能力有助于寻找松鼠这样的小猎物。

dogs have a wider field of vision than humans . dogs ' eyes are set slightly farther apart than humans ' eyes，so they can see further to

狗比人类视野更广。狗比人眼间距稍远，从各个方向都能看得更远。

dogs have blur rier long-distance vision than humans . a human with perfect vision has 20/20 vision、While dogs have 20/65 to 20/85this means that' a dog must be at 20 ft。to read a letter that a human with 20/20 vision would be

狗的远距离视力比人类更模糊。拥有完美视力的人类有20/20的视力，狗有20/65到20/85的视力。这意味着“狗必须在20英尺(约6米)处，拥有20/20视力的人才能看到65英尺或85英尺处的文字”。

dogs have trouble seeing things very close up。dogs can see objects clearly if they ' re at least 13 to 20 inches away from to But if the object is closer，the image may be blurry，' sypniewski

狗很难近距离观察事物。“当物体距离眼睛至少13 ~ 20英寸(约0.3 ~ 0.5米)时，狗可以清楚地看到。”但是，如果物体更近，眼睛的图像会变得模糊。人类可以看到更近10英寸(0.25米)的物体。

dogs may recognize you by your shape and motion。if your dog recognizes you from a distance，It is not because It can see the details of your face like a human would，but rather because of your shape

狗可以通过体型和动作来认识人。涅茨说。“如果你的狗能从远处认出你，那不是因为它能像人类一样清楚地看到你的脸，而是因为它知道你的体型或移动方式。”

来源：Insider

编辑：同情

资料来源：中国日报网