Chinese Eye Test
If you cannot decipher anything, then try pulling
the corner of your eyes as if you were Chinese.
It works
for your stupid racist insults
By squinting our eyes, it artificially makes the pupils smaller. By making the pupils smaller, the depth of field is increased, meaning you get better focusing on a wider range of distance. It is based on the same principle of pinhole. The smaller the hole, the sharper the object while a bigger hole will give you a blurr object in a certain fixed distance.