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I. Schmack, S. Saliji, M. P. Holzer, G. U. Auffarth; Corneal Higher-Order Wavefront Aberrations in Young Healthy Eyes: Comparison of Pentacam HR and Corneal Wavefront Analyzer. Invest. Ophthalmol. Vis. Sci. 2009;50(13):1564.
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To assess and compare corneal wavefront aberrations by two different measurement devices.
One-hundred and sixty eyes of 80 healthy subjects (age: 24.1±2.4 yrs; range: 20 to 30 yrs) with a mean spherical equivalent of -0.80 D (range -8.25 D to 8.75 D) were measured and analyzed for corneal higher order wavefront aberrations (3rd to 8th order) by the Pentacam HR (Oculus) and the Corneal Wavefront Analyzer (Schwind). Data were calculated for a 6-mm pupil and compared between both systems. In addition, a comparison of wavefront data of the anterior and posterior surface obtained by the Pentacam HR was performed.
The reliability of both devices was good and data (i.e. spherical-like, coma-like aberrations) were comparable between both systems. Analysis of anterior and posterior surface data showed significant differences in the amount of aberrations. Detailed analysis of higher order aberrations located in the cornea will be presented.
Both systems tested were reliable in measuring valid corneal wavefront data. The Pentacam additionally provides data from the posterior surface of the cornea which can be important for preoperative evaluation of patients prior to corneal refractive or therapeutic procedures.
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