June 2015
Volume 56, Issue 7
Free
ARVO Annual Meeting Abstract  |   June 2015
Correlation between factors related with previous myopic laser in situ keratomileusis and refractive error after intraocular lens implantation
Author Affiliations & Notes
  • Keiichiro Minami
    Miyata Eye Hospital, Miyakonojo, Japan
  • Yosai Mori
    Miyata Eye Hospital, Miyakonojo, Japan
  • Shiro Amano
    Miyata Eye Hospital, Miyakonojo, Japan
    Inoue Eye Hospital, Tokyo, Japan
  • Kazunori Miyata
    Miyata Eye Hospital, Miyakonojo, Japan
  • Kazutaka Kamiya
    Ophthalmology, Kitasato University, Sagamihara, Japan
  • Kimiya Shimizu
    Ophthalmology, Kitasato University, Sagamihara, Japan
  • Footnotes
    Commercial Relationships Keiichiro Minami, None; Yosai Mori, None; Shiro Amano, None; Kazunori Miyata, None; Kazutaka Kamiya, None; Kimiya Shimizu, None
  • Footnotes
    Support None
Investigative Ophthalmology & Visual Science June 2015, Vol.56, 2974. doi:https://doi.org/
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Keiichiro Minami, Yosai Mori, Shiro Amano, Kazunori Miyata, Kazutaka Kamiya, Kimiya Shimizu; Correlation between factors related with previous myopic laser in situ keratomileusis and refractive error after intraocular lens implantation. Invest. Ophthalmol. Vis. Sci. 2015;56(7 ):2974. doi: https://doi.org/.

      Download citation file:


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

      ×
  • Supplements
Abstract

Purpose: In eyes after myopic laser in situ keratomileusis (LASIK), power of intraocular lens (IOL) is underestimated by using conventional methods of IOL power calculation. Although plenty of calculation methods have been proposed, regression analysis of IOL power underestimation with respect to LASIK correction was rarely performed. This retrospective study was to evaluate factors related with refractive error after IOL implantation in post- myopic LASIK eyes.

Methods: Clinical records of eyes that had previously undergone myopic LASIK and received IOL in cataract surgery were observed. The study comprised of 30 eyes of 20 patients whose mean age was 58.8 years at cataract surgery. Period between LASIK and cataract surgeries was 2 to 13 years (mean: 9.6 years). All target refractions in LASIK were intended to emmetropia. Manifest refractions spherical equivalent (MRSEs) and keratometric refractions (Ks) were recorded before LASIK, and before and 1 month after cataract surgery. Ocular axial length (AXL) was also measured before cataract surgery. Predicted postoperative refraction was obtained by SRK/T and double-K formulas, and the difference from MRSE at 1 month was calculated as refractive error. Correlations between refractive error and, MRSE before LASIK, change in K between before LASIK and cataract surgeries, and AXL were analyzed with linear and multiple regression analyses.

Results: MRSE before LASIK was -2 to -13 D (mean: -7.5 D), and change in K was -1.06 to -8.00 D (mean: -4.37 D). Refractive error was 0.03 to 4.99 D (mean: 1.98 D) in the SRK/T, that was significantly correlated with MRSE before LASIK, change in K, and AXL (P < 0.0001, R2 = 0.51, 0.56, 0.52, respectively). Multiple regression analysis showed that refractive error had significant associations with change in K and AXL (P = 0.004 and 0.005, slope = -0.54 and 0.46 D/mm, respectively). In the double-K, significant correlation was found between refractive error and AXL (P = 0.001, slope = 0.38 D/mm).

Conclusions: In post-myopic LASIK eyes, refractive error was highly correlated with the amount of myopic correction in SRK/T formula. Significant correlation with AXL were found in both SRK/T and double-K formulas. This result demonstrated that compensation of K values only is not sufficient for IOL power calculation of post-LASIK eyes.

×
×

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.

×