Habituation refers to a habitual change in the perception of certain objects or things. Perceptual habit refers to the phenomenon that the patient will get used to the perception of certain things or objects after perceiving them for a long time. For example, if the patient perceives a slightly curved line as a straight line for a long time, after a period of time, he or she will not perceive the curved line as curved. Perceptual habit is mainly a person’s perception of external things, may be based on objective things as a criterion, through the human sensory system image, the response to external things. Perceptual habit belongs to the category of perception aspect. It is necessary for the patient to correctly recognize the perceptual habit under the guidance of a professional doctor so as not to distort the objective facts.