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. All Sw for corneal power measurements were below 0.26 D, with ICC above 0.982. The Sw for 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, its Sw was below 11.27°, with ICC above 0.975. The Sw and ICC for corneal eccentricity were 0.067 and 0.957, respectively. The Sw and ICC for high-order aberration root mean square (RMS) were 0.048 µm and 0.901, respectively. For 3rd- and 4th-order aberrometric parameters, all Sw were below 0.037 µm 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.
Highlights
Technological advances in ophthalmology have led to the development of multidiagnostic platforms that integrate several technologies in the same device allowing the measurement of different anatomical and optical parameters of the eye [1]
The aim of the current study was to evaluate the intrasession repeatability of corneal geometric and aberrometric measurements obtained with this multidiagnostic device in a sample of normal healthy eyes
New multidiagnostic devices combining Scheimpflug imaging and other technologies provide a complete analysis of corneal structure, including a large variety of anatomical and optical parameters [1]
Summary
Technological advances in ophthalmology have led to the development of multidiagnostic platforms that integrate several technologies in the same device allowing the measurement of different anatomical and optical parameters of the eye [1]. A new multidiagnostic platform has been developed that provides automatic measurements of corneal topography, corneal, internal and ocular aberrations, pachymetry, anterior chamber depth, iridocorneal angle, pupil diameter under different luminance conditions, and intraocular pressure (IOP), which is the VX120 system (Visionix-Luneau Technologies, Chartres, France). This system combines Scheimpflug imaging and Placido disk to provide a complete geometric analysis of the anterior corneal surface, as other commercially available topography systems. The aim of the current study was to evaluate the intrasession repeatability of corneal geometric and aberrometric measurements obtained with this multidiagnostic device in a sample of normal healthy eyes
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