The right frame is seen only with the right eye and the left frame with the left eye, creating the illusion of depth.

右边视频的桢只能被右眼看到，左边的只能被左眼看到。由此产生景深的幻觉。

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But are there any other explanations of who can reverse the spinning? We also asked viewers if they could perceive another common illusion, the "Magic Eye"?

但有的人能够倒转方向，有的不能，这又该有怎样的解释呢？为了了解事实真相，我们同时还让观察者观察另一张常见的错觉图，调查他们能否观察到“魔眼”？

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Rather, each large eye is a dome-shaped bundle of tubes.As you move about, only the tubes that are oriented toward you appear black, giving the illusion that you are being tracked.

每个大眼睛就像一束绑缚在一起的显像管，当你移动时，对著你的管子就显示成黑色，因此你会有种错觉，认为它在盯著你看。

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Smart phones will have color screens that, when held close to the eye, create the illusion of an 18- to 24-inch computer screen suitable for Web surfing and viewing high-resolution pictures.

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Also, the intricate polarized pattern, which sparkles under the sleek surface, creates a three-dimensional illusion that is eye-catching and exquisitely reminiscent of a jewel.

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Since human depth perception relies on calculating the difference between the angle of view coming to each eye, the result is a 3-D optical illusion.

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