We are also ignoring the concept of Quality Control. There are many types of optical distortion, and none of them are present in lens that are approved for use in theodolites from major manufacturers (which surveyors use)
The level of distortion that would pass undetected through QC is on the order of 0-2 seconds of angle. These types of distortion are not apparant to the human eye, even through magnification.
Also, the correct device to use for viewing a straight on line of sight is called a telescope.
I will be away for part of the coming week, I was awarded a chain of KFC franchises, I have to travel to Israel to interview some mossad agents who have applied for line cook jobs.