April 2009
Volume 50, Issue 13
Free
ARVO Annual Meeting Abstract  |   April 2009
Evaluation of the Distance Between the Corneal Apex and the Pupillary Center in Postoperative Results of Femtosecond Lasik
H. Fujiwara; Y. Kitazawa; H. Yamada; K. Konno; Y. Takahashi; K. Toshida; K. Abe
Author Affiliations & Notes
  • H. Fujiwara
    Ophthalmology, Kanagawa clinic, Osaka, Japan
  • Y. Kitazawa
    Ophthalmology, Kanagawa clinic, Tokyo, Japan
  • H. Yamada
    Ophthalmology, Kanagawa clinic, Osaka, Japan
  • K. Konno
    Ophthalmology, Kanagawa clinic, Tokyo, Japan
  • Y. Takahashi
    Ophthalmology, Kanagawa clinic, Tokyo, Japan
  • K. Toshida
    Ophthalmology, Kanagawa clinic, Tokyo, Japan
  • K. Abe
    Ophthalmology, Kanagawa clinic, Osaka, Japan
  • Footnotes
    Commercial Relationships  H. Fujiwara, None; Y. Kitazawa, None; H. Yamada, None; K. Konno, None; Y. Takahashi, None; K. Toshida, None; K. Abe, None.
  • Footnotes
    Support  None.
Investigative Ophthalmology & Visual Science April 2009, Vol.50, 1567. doi:
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      H. Fujiwara, Y. Kitazawa, H. Yamada, K. Konno, Y. Takahashi, K. Toshida, K. Abe; Evaluation of the Distance Between the Corneal Apex and the Pupillary Center in Postoperative Results of Femtosecond Lasik. Invest. Ophthalmol. Vis. Sci. 2009;50(13):1567.

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Abstract

Purpose: : We evaluated the association of the distance between the corneal apex and the pupillary center in femtosecond laser in situ keratomileusis (LASIK).

Methods: : The subjects consisted of 2,343 patients (1,219 males and 1,124 females: mean age, 33.2 years) who visited our clinic in August, 2008 and underwent femtosecond LASIK. The distance between the corneal apex and the pupillary center was calculated using a corneal topographer (TMS: Tomey) in preoperative examination, and possible differences in the visual acuity, refractive errors (spherical and cylindrical), and TMS data (Surface Asymmetry Index: SAI, Surface Regularity Index: SRI) in 1 day, 1 week and 1 month postoperatively were evaluated. In addition, patients who had -2.0D or more astigmatism with 0.0mm, 0.3mm or more distance from the corneal apex to the pupillary center were extracted, and possible differences in postoperative visual acuity, refractive errors (spherical/cylindrical) and TMS data (SAI/SRI) were evaluated.

Results: : The mean distance between the corneal apex and the pupillary center was 0.16 mm (0.00-0.39 mm). The mean postoperative uncorrected visual acuity was 1.4 (0.15-2.0) in 1 day, 1.5 (0.5-2.0) in 1 week and 1.5 (0.3-2.0) in 1 month. The mean spherical refractive error in 1 month postoperatively was +0.29 D (+2.25~-1.00 D), and the mean cylindrical refractive error was -0.39 D (0.00~-3.50 D). One month after the operation, the mean SAI was 0.31 (0.08~1.82), and the mean SRI was 0.19 (0.00-1.11). There were no differences in the distance between the corneal apex and the pupillary center, the postoperative uncorrected visual acuity, refractive errors (spherical/cylindrical) and TMS data (SAI, SRI). Moreover, no differences were observed in the postoperative visual acuity, refractive errors(spherical/cylindrical) and TMS deta(SAI, SRI) in the patients with astigmatism -2.0 D or more with 0.0mm, 0.3mm or more distance from the corneal apex to the pupillary center.

Conclusions: : Clinically, the distance between the corneal apex and the pupillary center is short which can not cause postoperative irregular astigmatism, and good results can be obtained by laser aberration of the pupillary center in all cases.

Keywords: refractive surgery: LASIK • aberrations • cornea: clinical science 
© 2009, The Association for Research in Vision and Ophthalmology, Inc., all rights reserved. Permission to republish any abstract or part of an abstract in any form must be obtained in writing from the ARVO Office prior to publication.
Copyright © 2025 Association for Research in Vision and Ophthalmology.
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