can't see beyond the end of one's nose.

Idioms and Phrases

Also, can't see farther than the end of one's nose . Lack foresight, envisioning only immediate events or problems, as in Thomas hasn't hired an orchestra for the Christmas concert; he just can't see beyond the end of his nose . This expression originated as a French proverb that was frequently cited in English from about 1700 on. Alexander Pope used a similar expression in his Essay on Man (1734): “Onward still he goes, Yet ne'er looks forward further than his nose.”