I am pretty sure I have seen a word for someone who often misses small details, but it has slipped out of my mind. Any ideas?
I looked up "observant," the antonym at thesaurus.com and there seem to be no suitable adjectives without a negating prefix, but "unobservant" or "imperceptive" might fit.
Sloppy comes to mind. When I looked up synonyms for that and antonyms for meticulous I found imprecise, superficial, negligent and unthorough (although Word does show the last one as misspelled for some reason). Was that what you were aiming for?