December 2002
Volume 43, Issue 13
Free
ARVO Annual Meeting Abstract  |   December 2002
Changes of Corneal Asphericity after Hyperopic LASIK
Author Affiliations & Notes
  • PJ Chastang
    Ophthalmology
    Fondation Rothschild Paris France
  • H Faraj
    Fondation Rothschild Paris France
  • D Gatinel
    Ophthalmology
    Fondation Rothschild Paris France
  • O Prisant
    Ophthalmology
    Fondation Rothschild Paris France
  • T Hoang-Xuan
    Ophthalmology
    Fondation Rothschild Paris France
  • Footnotes
    Commercial Relationships   P.J. Chastang, None; H. Faraj, None; D. Gatinel, None; O. Prisant, None; T. Hoang-Xuan, None.
Investigative Ophthalmology & Visual Science December 2002, Vol.43, 168. doi:
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    • Get Citation

      PJ Chastang, H Faraj, D Gatinel, O Prisant, T Hoang-Xuan; Changes of Corneal Asphericity after Hyperopic LASIK . Invest. Ophthalmol. Vis. Sci. 2002;43(13):168.

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

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Abstract

Abstract: : Purpose: To study the change in asphericity of the cornea after hyperopic LASIK performed with the Nidek EC-5000. Method: 25 hyperopic LASIK cases were included. Preoperative and three months postoperative values of axial simulated keratometry, axial central power (ACP), effective refractive power (EffRP), and corneal asphericity (Q) were recorded using the EyeSys 2000 videokeratoscope. Subjective refraction with cycloplegia was performed before and after surgery. Results: Mean preoperative and postoperative spherical equivalent (SE) were respectively 3.66 +/- 1.59 D and 0.46 +/- 075 D. Preoperative and postoperative Q values were respectively -0.16 +/- 0.10 and -0.68 +/- 0.55. Q value changes significantly correlated (p<0.05) with preoperative SE (r=-0.57), preoperative asphericity (r=-0.74), changes in SE (r=0.69), ACP (r=-0.78) and EffRP (r=-0.71) induced by LASIK. Conclusion: The cornea becomes more prolate after hyperopic LASIK. The change in asphericity correlates with the magnitude of treatment.

Keywords: 544 refractive surgery • 427 hyperopia • 397 emmetropization 
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