I don't think the sentence you quoted means what you think it means.
Tsig is talking about the ability of a circle maker in the dark to see what he or she is doing in the dark, not the ability of a farmer in a well lit house to see people are doing in the dark.
EDIT: it says you're from the piedmont area of NC. I lived in that area for 8 years, and I've had several nights where I went out into the middle of nowhere in parts of the piedmont (especially round bessemer city and kings mountain) with friends at night. After ten minutes or so, your eyes adjust well enough to see pretty clearly by moonlight alone. Don't confuse what you can see when you're on the porch of a well lit house with what someone in the dark can see.