expression, noun
frustratingly difficult task; roundabout and inefficient way
Idiom describing a task that is extremely difficult or an approach that is hopelessly indirect, like trying to apply eyedrops from the second floor. Often used to criticize an impractical method.
そんなやり方じゃ二階から目薬だよ。
That way of doing it is like trying to apply eyedrops from the second floor—totally impractical.
expression, noun
something totally ineffective
Emphasizes the complete ineffectiveness of an action or method; the result is so unlikely that it is practically useless.
この計画は二階から目薬だ。
This plan is completely ineffective.
Literally 'eyedrops from the second floor'. The image of trying to apply eyedrops from a high place conveys extreme difficulty and ineffectiveness. The exact origin is uncertain, but it is a well-known Japanese idiom.