Both devices can be used interchangeably in normal eyes, except for SA, but not in eyes with keratoconus or CXL for aberration measurements. The Pentacam AXL Wave showed comparable repeatability in the normal and keratoconus groups, but was poorer in the CXL group, more so with increasing corneal haze.
In the CXL group, all parameters varied significantly (P <. In the keratoconus group, mean differences were significant in all aberrations except RMS LOAs (-0.27 ± 0.85 μm, P =. In the normal group, mean differences between the two devices were nonsignificant for all parameters except SA (0.011 ± 0.038 μm, P <. Total aberrations had ICCs ranging from 0.88 for RMS HOAs to 0.95 for SA in the normal group, 0.86 for RMS HOAs to 0.92 for SA in the keratoconus group, and 0.72 for RMS HOAs to 0.82 for SA (poorer) in the CXL group. For pachymetry, Sw was 9.18, 9.53, and 10.11 in the normal, keratoconus, and CXL groups, respectively. The Pentacam AXL Wave had Sw for keratometry of 0.12 in the normal group and 0.15 in the keratoconus group and lower (poorer) Sw of 0.17 in the CXL group. Bland-Altman analysis assessed 95% limits of agreement and correlation coefficient (r) determined the strength of the relationship between measurements. Repeatability was assessed using within-subject standard deviation (Sw), test-retest variability, within-subject coefficient of variation (COV), and intraclass correlation coefficient (ICC). Objective assessment of haze after CXL was done using the Pentacam AXL Wave. Keratometry, pachymetry, objective refraction, and total ocular aberrations including root mean square (RMS) lower order aberrations (LOAs), RMS higher order aberrations (HOAs), RMS coma, and spherical aberrations (SA) were analyzed. measurements, at a single visit, using the Pentacam AXL Wave (Oculus Optikgeräte GmbH) and iTrace (Tracey Technologies). In this cross-sectional, observational study, normal, keratoconus, and CXL groups with 125 eyes in each of the three groups were included. To assess repeatability and agreement of a Scheimpflug topographer and a Hartmann-Shack aberrometer with a ray-tracing aberrometer in normal, keratoconus, and corneal cross-linking (CXL) groups. Comment: 20 pages, 9 figures, 4 tables View full-text This provides great versatility to the entire application package with presentations in two dimensions (2D) and three-dimensional (3D) on real geo-referenced maps. Thus, all input and output operations are handled by modern MATLAB program that implements the Fortran program and importing the output.
#Cost of itrace abberometer windows
For this reason, the core of the program to perform numerical integration, after the necessary amendments, was passed to a modern compiler under the Windows operating system and the executable has been imported into a MATLAB program. The input and output of this program require devices no longer in use for several decades and there are no compilers that accept instructions written for that type of mainframe.
#Cost of itrace abberometer registration
The code itself, as well as being very elegant, is highly efficient and provides the basis for many programs now in use mainly in the Coordinate Registration (CR) of Over The Horizon (OTH) radars. The program is written in FORTRAN 77, a mainframe CDC-3800. This work is inspired mainly by the program of Jones and Stephenson, widespread in the scientific community that is interested in radio propagation via the ionosphere. In fact, the program launches an executable that integrates the system of differential equations written in Fortran and importing the output in the MATLAB program, which generates graphics and other. It is a program whose interface with the user is created in MATLAB. The application package "IONORT" for the calculation of ray-tracing can be used by customers using the Windows operating system.
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