n.an
area or
subject where one's vision,
perception or
understanding are lacking; something that one is unable or unwilling to
confront or understand. This figurative
use comes from the blind
spot of the eye, a small
area of
blindness present in the
normal eye's
field of vision which corresponds to a
place at the back of the eyeball where the
optic nerve enters. The blind
spot does not react to light entering the eye and thus no
image can be seen at that
spot. This is present in all eyes but not normally noticeable by the person as it covers such a small
area and the blind
spot of either eye is compensated for through the vision of the other eye.