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PubMed · 16128329

Wavefront analysis in normal refractive surgery candidates.

Marcelo V Netto·Renato Ambrósio·Tueng T Shen·Steven E Wilson
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Abstract

PURPOSE: To quantify the higher order aberrations of refractive surgery candidates and compare the wavefront-determined refractions with manifest refractions refined with a +/- 0.25 Jackson cross cylinder. METHODS: Results of 226 consecutive patients (418 eyes) were analyzed with the WaveScan WavePrint system (VISX, Santa Clara, Calif). Only patients with normal eyes without previous surgery were included. RESULTS: The mean spherical equivalent refraction determined with wavefront analysis was -3.40 +/- 3.14 diopters (D) (range: -10.72 to +5.41 D). The largest amount of higher order aberrations was detected with : a 6-mm pupil diameter (coma 0.14 +/- 0.08 microm; trefoil 0.10 +/- 0.07 microm; spherical aberrations 0.09 +/- 0.07 microm). The mean root-mean-square of higher order aberrations and total aberrations were 0.23 +/- 0.11 microm and 4.00 +/- 2.45 microm, respectively. No statistically significant correlation was noted between higher order aberrations and gender (P = 0.7) or between higher order aberration and refractive level (P > .59). The mean differences in spherical equivalent refraction, sphere, and cylinder between WaveScan measurements and manifest refraction were 0.36 +/- 0.41 D, 0.40 +/- 0.44 D, and 0.28 +/- 0.32 D, respectively. CONCLUSIONS: This study provides reference values for higher order aberrations in normal refractive surgery candidates. Wavefront analysis also proved to be a valuable tool for objectively measuring preoperative refractive error.

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AdultAgedAstigmatismDiagnostic Techniques, OphthalmologicalFemaleHumansKeratomileusis, Laser In SituMaleMiddle AgedPupilReference ValuesRefraction, OcularRefractive Surgical ProceduresVision DisordersVisual AcuityJournal ArticleResearch Support, N.I.H., ExtramuralResearch Support, U.S. Gov't, P.H.S.

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Marcelo V Netto, Renato Ambrósio, Tueng T Shen, Steven E Wilson. Wavefront analysis in normal refractive surgery candidates.. https://doi.org/10.3928/1081-597x-20050701-06

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