Performance of a new binocular wavefront aberrometer based on a self-imaging diffractive sensor
| Autor: | Yueai Liu, Perry S. Binder, Lawrence H. Sverdrup, Laurence Warden, Andreas W. Dreher |
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| Rok vydání: | 2008 |
| Předmět: |
Wavefront
Vision Binocular genetic structures business.industry Wavefront aberrometer Linearity Reproducibility of Results Repeatability Wavefront sensor Refraction Ocular Refraction Noise (electronics) Models Biological eye diseases Standard deviation Refractive Surgical Procedures Ophthalmology Optics Humans Surgery sense organs business Mathematics |
| Zdroj: | Journal of refractive surgery (Thorofare, N.J. : 1995). 24(2) |
| ISSN: | 1081-597X |
| Popis: | PURPOSETo compare the performance of the OphthonixZ-View diffractive aberrometer with two different Hartmann-Shack aberrometers. METHODSThe Ophthonix Z-View was compared with the Alcon LADARWave and VISX WaveScan using 4 model eyes and 68 human eyes. Comparisons using three fixed, single-surface model eyes each with a different wavefront pattern were used to determine higher order accuracy. Lower order accuracy, linearity, and higher order repeatability were tested with a fourth model eye with a movable retinal surface. Manifest refraction spherical equivalent and the calculated spherical equivalent refraction of the aberrometers were compared in 68 human eyes. RESULTSThe Z-View was more accurate with lower noise compared to the WaveScan and LADARWave systems for higher order measurements of the fixed model eyes. Total root-mean-square difference from surface topography derived average values for all model eye configurations were 0.48, 0.95, and 0.74 µm for the Z-View, WaveScan, and LADARWave aberrometers, respectively. Average inter-measurement standard deviations for the fixed model eyes were 0.024, 0.025, and 0.034 µm for the Z-View, WaveScan, and LADARWave aberrometers, respectively. Results were similar among the systems for measuring the movable retina surface model eye and comparing manifest refraction spherical equivalent of the patients. CONCLUSIONSData gathered using one variable and several fixed-parameter model eyes showed good correlation to predicted values for all of the aberrrometers with one exception. A significant difference was found in the measurement of one individual fixed model eye with one of the three aberrometers. The wavefront refraction provided by the Z-View correlated well with the results of manifest refraction. [J Refract Surg. 2008;24:188-196.] ABOUT THE AUTHORS From Ophthonix Inc (Warden, Liu, Dreher, Sverdrup), Vista; and Gordon Binder and Weiss Vision Institute (Binder), San Diego, Calif. The authors have a financial interest in the Z-View wavefront sensor (Ophthonix Inc, Vista, Calif). Correspondence: Lawrence Sverdrup, PhD, Ophthonix Inc, 1491 Poinsetta Ave, Vista, CA 92081. Tel: 760.842.5810; Fax: 760.842.5610; E-mail:lsverdrup@ophthonix.com Received: August 17, 2006 Accepted: April 24, 2007 Posted online: September 28, 2007 |
| Databáze: | OpenAIRE |
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