‘忽视症’ (hūshì zhèng) is a medical and neuropsychological term referring to a condition—most commonly resulting from brain injury, especially in the parietal lobe—where a person fails to attend to or respond to stimuli on one side of their body or environment, despite having intact sensory organs. The word breaks down literally: 忽 (hū) means 'to neglect' or 'to overlook'; 视 (shì) means 'to see' or 'to perceive'; and 症 (zhèng) means 'syndrome' or 'disorder'. Together, they convey a syndrome rooted in perceptual neglect rather than sensory loss.

This term appears primarily in clinical contexts—neurology, rehabilitation medicine, and cognitive psychology—and is often used alongside terms like hemispatial neglect or unilateral neglect. It is not used casually or figuratively; unlike everyday expressions such as ‘忽视问题’ (to ignore a problem), 忽视症 denotes a specific, diagnosable neurological impairment requiring professional assessment and therapy.