title: Immediate changes in pupil size following Laser in situ keratomileusis (LASIK): Pupillometry study.
abstract: OBJECTIVE
  To investigate the impact of laser in situ keratomileusis (LASIK) on the change in pupil size immediately after the procedure.
  
  
  METHODS
  In a prospective study, measurement of pupil size was assessed in 70 eyes of 35 consecutive patients using a hand-held pupillometer before and immediately after LASIK in mesopic condition at the refractive eye center, Riyadh, Saudi Arabia.
  
  
  RESULTS
  The pupil showed mild dilation immediate after LASIK. Mean pupil size before LASIK was 4.10 ± 0.74 and immediate after was 4.74 ± 0.82, P value <0.0001. No association was found with age, sex, central corneal thickness or pre-operative refractive measurements (CCT).
  
  
  CONCLUSIONS
  There is a change in pupil size that immerses immediately after LASIK; postulations suggested for pupillary dilation include the effect of suction ring, post-operative steroid eye drops, dark room, pain and anxiety.
authors: Department of Ophthalmology, College of Medicine, King Saud University, Riyadh, Saudi Arabia.
authors: Essam A
authors: EA
authors: Osman
authors: Ahmed A
authors: AA
authors: Al-Saleh
keywords: Dilation; LASIK; Pupillometry; Suction ring
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