title: [The study of illusion in flight on flight pilots].
abstract: OBJECTIVE
  To observe the characteristics of illusion in flight in fighter pilots.
  
  
  METHODS
  A survey about illusion in flight was performed in 81 pilots who were under physical examination for modification to equipment of high performance aircraft.
  
  
  RESULTS
  1. Among 81 pilots, there were history of illusion in flight in 91.4% (74/81) cases. There were history of inclination illusion in 74 cases, rotation illusion in 1 case, inversion illusion in 1 case and pitch illusion in 1 case. 2. Among the 74 cases, 85.1% (63/74) claim relations with flying subjects, 81.1% (60/74) with distribution of attention, 74.3% (55/74) with light, 73.0% (54/74) with distribution of cloud layer, 71.6% (53/74) with visibility, 67.6%(50/74) with fatigue, 54.1% (40/74) with suspension of flying and 2.7%(2/74) with other factors. When illusion in flight appeared, 70 cases could easily overcome it, 4 cases felt a little difficult, but all 74 cases did not lead aircraft accident or potential accident.
  
  
  CONCLUSIONS
  Instructions in health about illusion in flight have made a considerably positive achievement in airman troops, but it must be continually paid more attention, and meanwhile, the space orientation system of aircraft must be improved.
authors.affiliation: Center of Clinic Aviation Medicine, P.L.A, General Hospital of Air Force, Beijing, 100036, China.
authors.forename: Xianrong
authors.initials: X
authors.lastname: Xu
authors.forename: Ting
authors.initials: T
authors.lastname: Zhao
authors.forename: Yang
authors.initials: Y
authors.lastname: Zhang
authors.forename: Chun
authors.initials: C
authors.lastname: Liu
authors.forename: Huafeng
authors.initials: H
authors.lastname: Liu
mesh_terms: D000328:Adult; D000337:Aerospace Medicine; D000401:Aircraft; D006801:Humans; D007088:Illusions / Q000209:etiology* / Q000502:physiology; D008297:Male; D008889:Military Personnel; D009039:Motion Perception; D009949:Orientation / Q000502:physiology; D011795:Surveys and Questionnaires