Final answer:
The irrigation unit should not be aimed directly at the eardrum during ear irrigation to prevent discomfort and potential injury; instead, it should be aimed at the ear canal wall.
Step-by-step explanation:
The statement that for irrigation of the ear, the irrigation unit should be aimed directly at the tympanic membrane to prevent discomfort for the patient is False. Irrigation of the ear involves cleaning the ear canal with a stream of water or other fluid. However, directly aiming at the tympanic membrane, or eardrum, is not recommended because it may damage the membrane and cause significant discomfort or even injury. The correct technique is to aim the stream of irrigation fluid at the wall of the ear canal to avoid such direct pressure on the eardrum.