On stage the conductor's eyes do not leave the score, so he cannot look at the musicians, and sometimes even the rhythm is thrown off, not to mention capturing the nuances of a piece.
有人甚至批評，指揮在台上眼睛離不開總譜，無法看著樂手，甚至拍子不能掌握好，更遑論指揮出細膩的表情。