In:
Journal of Refractive Surgery, SLACK, Inc., Vol. 21, No. 4 ( 2005-07), p. 332-338
Abstract:
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 µm; trefoil 0.10±0.07 µm; spherical aberrations 0.09±0.07 µm). The mean root-mean-square of higher order aberrations and total aberrations were 0.23 ±0.11 µm and 4.00 ± 2.45 µm, respectively. No statistically significant correlation was noted between higher order aberrations and gender (P=0.78) 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. [J Refract Surg. 2005;21:332-338.]
Type of Medium:
Online Resource
ISSN:
1081-597X
DOI:
10.3928/1081-597X-20050701-06
Language:
English
Publisher:
SLACK, Inc.
Publication Date:
2005
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