May 2008
Volume 49, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2008
Comparison of Corneal and Total Ocular High-Order Optical Aberrations Before and After Myopic Laser in situ Keratomileusis
Author Affiliations & Notes
  • D. Gatinel
    Ophthalmology, Rothschild Foundation - AP-HP Bichat Claude Bernard, Paris, France
  • P. Adam
    Ophthalmology, Rothschild Foundation - AP-HP Bichat Claude Bernard, Paris, France
  • S. Chaabouni
    Ophthalmology, Rothschild Foundation - AP-HP Bichat Claude Bernard, Paris, France
  • J. Munck
    Ophthalmology, Rothschild Foundation - AP-HP Bichat Claude Bernard, Paris, France
  • M. Thévenot
    Ophthalmology, Rothschild Foundation - AP-HP Bichat Claude Bernard, Paris, France
  • T. Hoang-Xuan
    Ophthalmology, Rothschild Foundation - AP-HP Bichat Claude Bernard, Paris, France
  • H. Bains
    Ophthalmology, Rothschild Foundation - AP-HP Bichat Claude Bernard, Paris, France
  • CEROC (Center of Expertise and Research in Optics for Clinicians)
    Ophthalmology, Rothschild Foundation - AP-HP Bichat Claude Bernard, Paris, France
  • Footnotes
    Commercial Relationships  D. Gatinel, None; P. Adam, None; S. Chaabouni, None; J. Munck, None; M. Thévenot, None; T. Hoang-Xuan, None; H. Bains, None.
  • Footnotes
    Support  None.
Investigative Ophthalmology & Visual Science May 2008, Vol.49, 5639. doi:
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      D. Gatinel, P. Adam, S. Chaabouni, J. Munck, M. Thévenot, T. Hoang-Xuan, H. Bains, CEROC (Center of Expertise and Research in Optics for Clinicians); Comparison of Corneal and Total Ocular High-Order Optical Aberrations Before and After Myopic Laser in situ Keratomileusis. Invest. Ophthalmol. Vis. Sci. 2008;49(13):5639.

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

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Abstract

Purpose: : To evaluate the changes in total and corneal aberrations and the compensation of aberrations within the human eye after conventional myopic laser in situ keratomileusis (LASIK).

Methods: : Total and corneal aberrations were measured preoperatively and 3 months postoperatively for 57 eyes. The NIDEK EC-5000 excimer laser was used for all treatments. Total and corneal aberrations root-mean-square (RMS) values were calculated out to the 6th Zernike orders for a 6.0-mm pupil diameter. The percentage of increase after surgery was defined by the ratio between the RMS values pre- and postoperatively for each of the corneal and total eye aberration groups. The compensation between corneal and internal aberrations for a given aberration group was defined by the ratio:(corneal aberration group RMS- total eye aberration group RMS)/ corneal aberration group RMS). A p-value less than 0.05 was considered statistically significant.

Results: : Postoperatively, higher order aberrations showed a statistically significant increase after myopic LASIK by a factor of 1.77±1.26 (total) and 2.47±2.25 (corneal) (p <0.05). Coma aberration increased by 2.43±2.61 (total) and 2.56±2.66 (corneal) . Spherical aberration increased by a factor 1.46±1.83 (total) and 2.64±2.24 (cornea). The values of the ratio of compensation did not show statistically significant differences before and after LASIK for individual aberrations (p>0.05).

Conclusions: : Although myopic LASIK induced significant corneal aberrations, the level of partial compensation of corneal aberrations by internal structures remained unchanged. These results may suggest that a previously described emmetropization that is effective not only with developmental factors but also with acquired variations in corneal shape.

Keywords: aberrations • refractive surgery: optical quality • refractive surgery: LASIK 
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