In the poem On his blindness by John Milton, we find these lines
“Doth God exact day-labour, light denied?”
Keeping in mind the lines above and lines below the quoted line, the quoted might mean that if God accept/want service only from who have light in their eyes?
So, keeping the probable meaning of that line in mind, I feel that "exact" might have some other meaning in archaic sense. I want the confirmation (or denial) of this and it's archaic meaning.