摘要：Seeing the impossible，we can't always believe the things，we see sometimes our minds and eyes make mistakes，and this is because we'

我学生的复述。

Seeing the impossible，we can't always believe the things，we see sometimes our minds and eyes make mistakes，and this is because we're looking and at optical illusion，an optical is related to sight，and illusion is something looks different from what it really is，optical illusion is exactly a trick that our eyes play on us。

not everyone see things in the same way，and we often see things in our personal。

at first look people say that they are not straight，let's compare against an object with a straight edge，and you'll see otherwise，the square one is clearly gray，square two is it white or gray，you're not going to believe the answer，square one and two are exactly the same color。

it's because our brain notices the shadow made by the apple，and it's also an optical illusion，let's look closely are the circles moving together，of course not，it's not real，our brains make up the circle things like wheels on it，and the imagine is moving，so our side on the circles are moving too。

来源：Cherry英式英语工作室