July 2018
Volume 59, Issue 9
Open Access
ARVO Annual Meeting Abstract  |   July 2018
Effect of angle kappa on deviation of corneal vertex after small incision lenticule extraction (SMILE) for the correction of myopia
Author Affiliations & Notes
  • Wenbo Cheng
    Tianjin eye hospital & eye institute, Tianjin key lab of ophthalmology and visual science,Tianjin medical university, TIANJIN, China
  • Yan Wang
    Tianjin eye hospital & eye institute, Tianjin key lab of ophthalmology and visual science,Tianjin medical university, TIANJIN, China
  • Jiamei Zhang
    Tianjin eye hospital & eye institute, Tianjin key lab of ophthalmology and visual science,Tianjin medical university, TIANJIN, China
  • Lin Zhang
    Tianjin eye hospital & eye institute, Tianjin key lab of ophthalmology and visual science,Tianjin medical university, TIANJIN, China
  • TONG CUI
    Tianjin eye hospital & eye institute, Tianjin key lab of ophthalmology and visual science,Tianjin medical university, TIANJIN, China
  • Wei Zhao
    Tianjin eye hospital & eye institute, Tianjin key lab of ophthalmology and visual science,Tianjin medical university, TIANJIN, China
  • Footnotes
    Commercial Relationships   Wenbo Cheng, None; Yan Wang, None; Jiamei Zhang, None; Lin Zhang, None; TONG CUI, None; Wei Zhao, None
  • Footnotes
    Support  National Natural and Science Program Grant of China NO.81470658 and 81670884
Investigative Ophthalmology & Visual Science July 2018, Vol.59, 5781. doi:
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Wenbo Cheng, Yan Wang, Jiamei Zhang, Lin Zhang, TONG CUI, Wei Zhao; Effect of angle kappa on deviation of corneal vertex after small incision lenticule extraction (SMILE) for the correction of myopia. Invest. Ophthalmol. Vis. Sci. 2018;59(9):5781.

      Download citation file:


      © ARVO (1962-2015); The Authors (2016-present)

      ×
  • Supplements
Abstract

Purpose : Angle kappa is defined as the angle between the pupillary and visual axes. The present study aimed to investigate the effect of angle kappa on deviation of corneal vertex after SMILE surgery.

Methods : A total of 43 consecutive patients (86 eyes) underwent the SMILE surgery at a single eye hospital were included in the present study. The location between pupil center and corneal vertex was measured using a Scheimpflug camera preoperatively and at 1, 3, and 6 months postoperatively. The distance between the corneal vertex and pupil center was defined as the deviation (D), while the difference vector between preoperative and postoperative locations of corneal vertex was defined as ΔD. The correlations between ΔD and spherical equivalent (SE)/average changes in pupil diameter were analyzed.

Results : We observed significant postoperative increases in D values, which were mainly in changes of the y-coordinates (P<0.05 for both eyes). D values were increased at 1, 3, and 6 months postoperatively (P<0.001 for both eyes). A significant correlation was observed between ΔD and SE (r=-0.408, P<0.001) following SMILE surgery, while no correlation between ΔD and changes in pupil diameter. Moreover, no significant differences in ΔD were noted at 1, 3, and 6 months postoperatively (P>0.05 for both eyes).

Conclusions : Our findings demonstrated that the SMILE technique can achieve appropriate centration, although the deviation of corneal vertex detected increases lightly following SMILE surgery, which independent from angle kappa preoperatively, might relate to the wound healing during the postoperative period.

This is an abstract that was submitted for the 2018 ARVO Annual Meeting, held in Honolulu, Hawaii, April 29 - May 3, 2018.

×
×

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.

×