Visual performance after LASIK for a <i>Q</i>-optimized and a standard ablation algorithm

César Villa; José R. Jiménez; Rosario G. Anera; Ramón Gutiérrez; Enrique Hita

doi:10.1364/AO.48.005741

Visual performance after LASIK for a Q-optimized and a standard ablation algorithm

César Villa, José R. Jiménez, Rosario G. Anera, Ramón Gutiérrez, and Enrique Hita

Applied Optics
Vol. 48,
Issue 30,
pp. 5741-5747
(2009)
•https://doi.org/10.1364/AO.48.005741

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César Villa, José R. Jiménez, Rosario G. Anera, Ramón Gutiérrez, and Enrique Hita, "Visual performance after LASIK for a Q-optimized and a standard ablation algorithm," Appl. Opt. 48, 5741-5747 (2009)

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Related Topics
Table of Contents Category
- Vision, Color, and Visual Optics
Optics & Photonics Topics
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The topics in this list come from the OSA Optics and Photonics Topics applied to this article.
Previously assigned OCIS codes
- Vision (330.7310)
- Visual optics, refractive surgery (330.7335)

About this Article
History
- Original Manuscript: July 2, 2009
- Revised Manuscript: September 23, 2009
- Manuscript Accepted: September 24, 2009
- Published: October 13, 2009
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Abstract

We test visual performance after LASIK (laser in situ keratomileusis) for a Q-optimized ablation algorithm and one based on the Munnerlyn formula. The visual functions tested include aberrometry, monocular and binocular contrast sensitivity function (CSF), and a discrimination test under low-illumination conditions. This test is useful to quantify night-vision disturbances. A total of 102 patients took part in the ex periments, and visual data were taken before (with best correction) and after LASIK. Results show a deterioration in aberrometry, CSF, binocular summation, and discrimination index for the two algorithms tested, although this deterioration is significantly lower for the Q-optimized algorithm.

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	Group I (Both F-CAT)	Group II (Both Standard Ablation)	Group III (F-CAT)	Group III (Standard Ablation)
Presurgery spherical aberration	$0.218 \pm 0.057$	$0.147 \pm 0.041$	$0.188 \pm 0.029$	$0.206 \pm 0.021$	$p = 0.003$
Postsurgery spherical aberration	$0.286 \pm 0.071$	$0.470 \pm 0.090$	$0.265 \pm 0.051$	$0.702 \pm 0.114$	$p = 0.003$
Presurgery HOA	$0.378 \pm 0.042$	$0.502 \pm 0.053$	$0.478 \pm 0.049$	$0.499 \pm 0.052$	$p = 0.01$
Postsurgery HOA	$0.422 \pm 0.051$	$0.802 \pm 0.093$	$0.501 \pm 0.060$	$0.742 \pm 0.062$	$p = 0.01$
Presurgery corneal asphericity	$- 0.23 \pm 0.18$	$- 0.29 \pm 0.21$	$- 0.34 \pm 0.23$	$- 0.38 \pm 0.24$	$p = 0.02$
Postsurgery corneal asphericity	$- 0.26 \pm 0.19$	$0.65 \pm 0.31$	$- 0.37 \pm 0.21$	$0.71 \pm 0.29$	$p = 0.02$

	Group I (both F-CAT)	Group II (both Standard Ablation)	Group III (F-CAT)	Group III (Standard Ablation)
Presurgery discrimination index (best-corrected)	$0.38 \pm 0.19$	$0.36 \pm 0.18$	$0.43 \pm 0.22$	$0.49 \pm 0.21$	$p = 0.001$
Postsurgery discrimination index	$0.52 \pm 0.34$	$0.76 \pm 0.41$	$0.54 \pm 0.31$	$0.81 \pm 0.43$	$p = 0.001$

	Group I (Both F-CAT)	Group II (Both Standard Ablation)	Group III (F-CAT)	Group III (Standard Ablation)
Presurgery spherical aberration	$0.218 \pm 0.057$	$0.147 \pm 0.041$	$0.188 \pm 0.029$	$0.206 \pm 0.021$	$p = 0.003$
Postsurgery spherical aberration	$0.286 \pm 0.071$	$0.470 \pm 0.090$	$0.265 \pm 0.051$	$0.702 \pm 0.114$	$p = 0.003$
Presurgery HOA	$0.378 \pm 0.042$	$0.502 \pm 0.053$	$0.478 \pm 0.049$	$0.499 \pm 0.052$	$p = 0.01$
Postsurgery HOA	$0.422 \pm 0.051$	$0.802 \pm 0.093$	$0.501 \pm 0.060$	$0.742 \pm 0.062$	$p = 0.01$
Presurgery corneal asphericity	$- 0.23 \pm 0.18$	$- 0.29 \pm 0.21$	$- 0.34 \pm 0.23$	$- 0.38 \pm 0.24$	$p = 0.02$
Postsurgery corneal asphericity	$- 0.26 \pm 0.19$	$0.65 \pm 0.31$	$- 0.37 \pm 0.21$	$0.71 \pm 0.29$	$p = 0.02$

	Group I (both F-CAT)	Group II (both Standard Ablation)	Group III (F-CAT)	Group III (Standard Ablation)
Presurgery discrimination index (best-corrected)	$0.38 \pm 0.19$	$0.36 \pm 0.18$	$0.43 \pm 0.22$	$0.49 \pm 0.21$	$p = 0.001$
Postsurgery discrimination index	$0.52 \pm 0.34$	$0.76 \pm 0.41$	$0.54 \pm 0.31$	$0.81 \pm 0.43$	$p = 0.001$

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