title: Intraoperative perception and sensation in laser in situ keratomileusis (LASIK).
abstract: OBJECTIVE
  To investigate intraoperative perception and sensation during Laser in situ Keratomileusis (LASIK).
  
  
  METHODS
  Sixty patients with uneventful LASIK were included. All procedures were performed by one surgeon with one technique. Any patient with intra-operative complications was excluded. The patients were asked to fill in the subjective evaluation form regarding their perception and sensation during the operation.
  
  
  RESULTS
  Twenty-nine patients (48%) reported no pain and twenty-six patients (43%) reported no burning sensation during the surgery. Nineteen patients (32%) reported no light perception during the suction period of microkeratome. There was no correlation between duration of the suction and no light perception (R2 0.01). Thirty-four patients (56%) reported no trouble in maintaining visual fixation at the red light during the laser treatment. Ten patients (16%) reported they could clearly see the movement during the surgery and 5 out of 10 patients (50% of 16%) reported visual frightening. Fifty cases (84%) reported no visual frightening during the surgery after reassurance of the visual experience by the surgeon before the surgery.
  
  
  CONCLUSIONS
  Patients undergoing LASIK may experience different visual perceptions. Reassurance of the intraoperative perception and sensation before the surgery can reduce the visual frightening.
authors.affiliation: Department of Ophthalmology, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand. sabong@pol.net
authors.forename: Sabong
authors.initials: S
authors.lastname: Srivannaboon
authors.forename: Ekktet
authors.initials: E
authors.lastname: Chansue
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D007432:Intraoperative Period; D020731:Keratomileusis, Laser In Situ; D008297:Male; D010465:Perception; D012677:Sensation