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Relationship Between Corneal Aberrations and Contrast Sensitivity After Hyperopic Laser in Situ Keratomileusis

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Abstract

Purpose

To evaluate the relationship between corneal aberrations and contrast sensitivity (CS) after hyperopic laser in situ keratomileusis (H-LASIK).

Methods

In 13 patients (13 eyes) who underwent H-LASIK, we measured CS and corneal topography preoperatively and at 1 year postoperatively. Photopic and scotopic CS values were measured at 3, 6, and 12 cycles/degree (cpd) using an MCT-8000 contrast tester. Corneal aberrations were determined from the data on corneal topography using CTView. The corneal high-order aberrations were defined as the sum of the third- and fourth-order aberrations in the 4-mm zone and the sum of the third- to sixth-order aberrations in the 6-mm-zone.

Results

Under scotopic conditions at 12 cpd, the changes in CS significantly correlated with changes in the corneal aberrations. Scotopic CS was significantly deteriorated by glare, but photopic CS was not significantly changed. H-LASIK induced a significant increase in corneal aberrations that positively correlated with the amount of correction, regardless of the improvement in logMAR corrected visual acuity. LogMAR corrected visual acuity did not significantly correlate with corneal aberrations. Furthermore, decentration significantly correlated with the changes in the 6-mm zone corneal aberrations.

Conclusions

In eyes after H-LASIK, the changes in scotopic CS significantly correlated with those in the corneal aberrations, which might have resulted from decentration or ablation profiles in H-LASIK and a relatively small optical zone. Further studies will be needed to validate this relationship. Jpn J Ophthalmol 2006;50:147–152 © Japanese Ophthalmological Society 2006

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Authors and Affiliations

  1. Department of Ophthalmology, Nara Medical University, Nara, Japan

    Tetsuo Ueda, Yoshiaki Nawa, Kozo Masuda, Hidetoshi Ishibashi & Yoshiaki Hara

  2. Department of Orthoptics and Visual Science, Kitasato University School of Allied Health Sciences, Tokyo, Japan

    Hiroshi Uozato

Authors
  1. Tetsuo Ueda
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  2. Yoshiaki Nawa
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  3. Kozo Masuda
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  4. Hidetoshi Ishibashi
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  5. Yoshiaki Hara
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  6. Hiroshi Uozato
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Correspondence to Tetsuo Ueda.

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Ueda, T., Nawa, Y., Masuda, K. et al. Relationship Between Corneal Aberrations and Contrast Sensitivity After Hyperopic Laser in Situ Keratomileusis. Jpn J Ophthalmol 50, 147–152 (2006). https://doi.org/10.1007/s10384-005-0285-x

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  • DOI: https://doi.org/10.1007/s10384-005-0285-x

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