Calculating Angle Lambda (λ) Using Zernike Tilt Measurements in Specular Reflection Corneal Topography
نویسندگان
چکیده
منابع مشابه
Measurement of Angle Kappa Using Ultrasound Biomicroscopy and Corneal Topography
PURPOSE To introduce a new convenient and accurate method to measure the angle kappa using ultrasound biomicroscopy (UBM) and corneal topography. METHODS Data from 42 eyes (13 males and 29 females) were analyzed in this study. The angle kappa was measured using Orbscan II and calculated with UBM and corneal topography. The angle kappa of the dominant eye was compared with measurements by Orbs...
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The optical behaviour of the human eye is often characterized with the Zernike coefficients. Great number of measurements and statistical data are available for individuals and for various groups of people concerning the Zernike coefficients of their eyes. Although, these coefficients were obtained from measurements at discrete points and via computations using some discretization of the contin...
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UNLABELLED PURPOSETo review the topographic patterns associated with keratoconus suspects and provide criteria for keratoconus screening. METHODS Case study using maps from the NIDEK OPD-Scan II and OPD Station to highlight patterns seen in keratoconic corneas. RESULTS Five criteria are listed for the detection of keratoconus: 1) apex of the cone is not centered at the 6-o'clock semi-meridi...
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Electron tomography can provide three dimensional (3D) visualization of nanoscale objects in a transmission electron microscope (TEM) from a tilt series of projected images. The accuracy of the 3D reconstruction depends on quality of input parameters, including accurate alignment in real space and accuracy of tilt and azimuth angle measurements. Here we present an electron diffraction-based in-...
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ژورنال
عنوان ژورنال: Journal of Optometry
سال: 2009
ISSN: 1888-4296
DOI: 10.3921/joptom.2009.207