July 2019
Volume 60, Issue 9
Free
ARVO Annual Meeting Abstract  |   July 2019
Induced corneal higher-order aberrations and decentration following small-incision lenticule extraction procedure
Author Affiliations & Notes
  • Tae-im Kim
    Ophthalmology, Severance Hospital, Yonsei University, Seoul, Korea (the Democratic People's Republic of)
  • Hun Lee
    Ophthalmology, International St. Mary's Hospital, Catholic Kwandong University College of Medicine, Incheon, Korea (the Republic of)
  • David Sung Yong Kang
    Eyereum Eye Clinic, Seoul, Korea (the Republic of)
  • Eung Kweon Kim
    Ophthalmology, Severance Hospital, Yonsei University, Seoul, Korea (the Democratic People's Republic of)
  • Kyoungyul Seo
    Ophthalmology, Severance Hospital, Yonsei University, Seoul, Korea (the Democratic People's Republic of)
  • Hyung Keun Lee
    Ophthalmology, Severance Hospital, Yonsei University, Seoul, Korea (the Democratic People's Republic of)
  • Footnotes
    Commercial Relationships   Tae-im Kim, None; Hun Lee, None; David Sung Yong Kang, None; Eung Kweon Kim, None; Kyoungyul Seo, None; Hyung Keun Lee, None
  • Footnotes
    Support  None
Investigative Ophthalmology & Visual Science July 2019, Vol.60, 5058. doi:https://doi.org/
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Tae-im Kim, Hun Lee, David Sung Yong Kang, Eung Kweon Kim, Kyoungyul Seo, Hyung Keun Lee; Induced corneal higher-order aberrations and decentration following small-incision lenticule extraction procedure. Invest. Ophthalmol. Vis. Sci. 2019;60(9):5058. doi: https://doi.org/.

      Download citation file:


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

      ×
  • Supplements
Abstract

Purpose : To investigate the amount of lenticule decentration following small-incision lenticule extraction by using the Keratron Scout tangential topography difference map, and to determine the relationship between the magnitudes of total decentration and induced corneal higher-order aberrations

Methods : In this retrospective observational case series study, we analyzed decentration values using the Keratron Scout tangential topography difference map of 360 eyes (360 patients) that underwent small-incision lenticule extraction procedure. We measured root mean square total higher-order aberrations, root mean square third order coma aberration, root mean square fourth order spherical aberration, as well as individual coefficients for vertical and horizontal coma using the Keratron Scout preoperatively and 3-months postoperatively. To determine the relationship between the magnitudes of total decentration and induced corneal higher-order aberrations, we performed simple linear regression analysis and piecewise regression models.

Results : The mean total decentration distance from the corneal vertex was 0.36 ± 0.22 mm (range, 0.02-1.27 mm). There were significant differences in total higher-order aberrations, coma aberration, vertical and horizontal comas, and spherical aberration between preoperative and 3-month postoperative assessments. Significant relationships between the magnitudes of total decentration and induced corneal higher-order aberrations were noted. Subgroup analysis according to the degree of total decentration (Group I, total decentered displacement ≤0.335 mm and Group II, total decentered displacement >0.335 mm) revealed that induced changes in total higher-order aberrations, coma aberration, vertical coma, and spherical aberration were significantly larger in Group II than in Group I.

Conclusions : A minimal degree of decentration was closely related to a smaller induction of corneal higher-order aberrations. Therefore, efforts to optimize centration are critical for achieving better surgical outcomes in small-incision lenticule extraction procedure

This abstract was presented at the 2019 ARVO Annual Meeting, held in Vancouver, Canada, April 28 - May 2, 2019.

×
×

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.

×