title: Corneal Topographic and Aberrometric Measurements Obtained with a Multidiagnostic Device in Healthy Eyes: Intrasession Repeatability.
abstract: Purpose. To evaluate the intrasession repeatability of corneal curvature, eccentricity, and aberrometric measurements obtained with a multidiagnostic device in healthy eyes.Methods. This study enrolled 107 eyes of 107 patients ranging in age from 23 to 65 years. All of them underwent a complete anterior segment examination with the VX120 system (Visionix-Luneau Technologies, Chartres, France). Three consecutive measurements were obtained. The within-subject standard deviation (Sw), intrasubject precision (1.96 ×Sw), and intraclass correlation coefficient (ICC) were calculated.Results. AllSwfor corneal power measurements were below 0.26 D, with ICC above 0.982. TheSwfor corneal astigmatism at different areas (3, 5, and 7 mm) was below 0.21 D, with ICC above 0.913. Concerning the axis of astigmatism, itsSwwas below 11.27°, with ICC above 0.975. TheSwand ICC for corneal eccentricity were 0.067 and 0.957, respectively. TheSwand ICC for high-order aberration root mean square (RMS) were 0.048µm and 0.901, respectively. For 3rd- and 4th-order aberrometric parameters, allSwwere below 0.037µm and all ICC were higher than 0.84, except for quadrafoil RMS (ICC: 0.689).Conclusions. The multidiagnostic device evaluated is able to provide consistent measurements of corneal power, eccentricity, and third- and fourth-order aberrations in healthy eyes.
authors.affiliation: Group of Optics and Visual Perception, Department of Optics, Pharmacology and Anatomy, University of Alicante, Alicante, Spain.
authors.forename: David P
authors.identifier: 0000-0002-1546-4807
authors.initials: DP
authors.lastname: Piñero
authors.affiliation: Optometry Clinic, Prevention Service of the University of Alicante, Alicante, Spain.
authors.forename: Alberto
authors.initials: A
authors.lastname: López-Navarro
authors.affiliation: Group of Optics and Visual Perception, Department of Optics, Pharmacology and Anatomy, University of Alicante, Alicante, Spain.
authors.forename: Inmaculada
authors.initials: I
authors.lastname: Cabezos
authors.affiliation: Group of Optics and Visual Perception, Department of Optics, Pharmacology and Anatomy, University of Alicante, Alicante, Spain.
authors.forename: Dolores
authors.initials: D
authors.lastname: de Fez
authors.affiliation: Group of Optics and Visual Perception, Department of Optics, Pharmacology and Anatomy, University of Alicante, Alicante, Spain.
authors.forename: María T
authors.initials: MT
authors.lastname: Caballero
authors.affiliation: Group of Optics and Visual Perception, Department of Optics, Pharmacology and Anatomy, University of Alicante, Alicante, Spain.
authors.forename: Vicent J
authors.initials: VJ
authors.lastname: Camps