title: Eyelid dynamics and supratarsal crease appearance after double eyelid surgery.
abstract: BACKGROUND
  Although double eyelid surgery is one of the most common cosmetic surgeries among Asians, there are few reports to confirm the physiology of eye blinking after such surgeries. This study analyzed eyelid dynamics and supratarsal crease appearance after double eyelid surgery using a high-speed digital camera to provide precise movement detection.
  
  
  METHODS
  Twenty healthy volunteers and 15 patients who underwent double eyelid surgery with tarsodermal fixation were studied. Using the slow-motion replay setting of a high-speed digital camera, the patients' spontaneous eye blinking was analyzed for (1) blink duration, (2) peak eyelid velocity, (3) blink rate, and (4) supratarsal crease appearance.
  
  
  RESULTS
  After double eyelid surgery, there were no significant differences in blink duration, peak eyelid velocity, or blink rate compared with the control group. Regarding supratarsal crease appearance, dynamic creases were created in 6 of 15 patients, whereas 9 patients showed static creases.
  
  
  CONCLUSIONS
  Double eyelid surgery with tarsodermal fixation does not alter lid dynamics of spontaneous eye blinking. Furthermore, the tarsodermal fixation method, which is known to create a static crease, could also lead to the development of a dynamic crease.
authors.affiliation: Institute for Human Tissue Restoration, Department of Plastic and Reconstructive Surgery, Yonsei University Health System, Severance Hospital, Seoul, Korea.
authors.forename: Dong Won
authors.initials: DW
authors.lastname: Lee
authors.forename: Inho
authors.initials: I
authors.lastname: Bae
authors.forename: Eul Je
authors.initials: EJ
authors.lastname: Cho
authors.forename: Chung Hun
authors.initials: CH
authors.lastname: Kim
authors.forename: Chae Min
authors.initials: CM
authors.lastname: Kim
authors.forename: Dong Kyun
authors.initials: DK
authors.lastname: Rah
authors.forename: Yong Oock
authors.initials: YO
authors.lastname: Kim
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D044466:Asian People; D019882:Blepharoplasty / Q000379:methods*; D001767:Blinking / Q000502:physiology*; D016022:Case-Control Studies; D005143:Eyelids / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D055815:Young Adult