EYESERVICE (ὀφθαλμοδουλία, G4056, a Hel. compound, service to be seen, to please the eyes, not therefore out of any good motivation). The term appears in nearly identical phrases (Eph 6:6; Col 3:22). The term is defined perfectly in the context in Ephesians, “Slaves, be obedient...not in the way of eyeservice, as menpleasers, but as servants of Christ, doing the will of God from the heart.”
International Standard Bible Encyclopedia (1915)
A term coined by Paul to express the conduct of slaves, who work only when they are watched, and whose motive, therefore, is not fidelity to duty, but either to avoid punishment or to gain reward from their masters (Eph 6:6; Col 3:22). "A vice which slavery everywhere creates and exhibits. Hence, the need for drivers and overseers" (Eadie).