Here’s a great video on how the new Google logo is not “perfectly” (geometrically) rendered:

It talks about how different aspects of the letters are tweaked to account for optical illusions. The same kind of thing might’ve been planned during the construction of the Greek Parthenon, which looks perfect but is actually offset to account for how the human eye sees things. For example, the Parthenon’s columns are not straight up-and-down columns: