НЕ ВИДЕТЬ ДАЛЬШЕ СВОЕГО НОСА

[n'e vid'et' dal'she svoyevo nosa]

Not to see farther than one's nose.

To lack imagination or insight; to be conscious only of circumstances round one; the situation one is now in or events that are presently happening.

Cf. Not to see an inch beyond one's nose; to see no further than one's nose.