This makes me think of optical margins which are used in some typesetting software (like LaTeX with the microtype package). The thing is when it comes to geomet

This makes me think of optical margins which are used in some typesetting software (like LaTeX with the microtype package). The thing is when it comes to geometry for human consumption the only thing that matters is how it looks. My Dad actually taught me this a long time before I knew about typography. He told me that while a spirit level is an important tool, it's a mistake to put a shelf up level if it doesn't look level next to the ceiling.