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Intrasession repeatability of refractive and ocular aberrometric measurements obtained using a multidiagnostic device in healthy eyes

Authors Piñero DP, López-Navarro A, Cabezos I, de Fez D, Caballero MT, Camps VJ

Received 17 January 2017

Accepted for publication 20 February 2017

Published 4 May 2017 Volume 2017:9 Pages 91—96


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 3

Editor who approved publication: Mr Simon Berry

David P Piñero,1 Alberto López-Navarro,2 Inmaculada Cabezos,1 Dolores de Fez,1 María T Caballero,1 Vicent J Camps1

1Group of Optics and Visual Perception, Department of Optics, Pharmacology and Anatomy, University of Alicante, 2Optometry Clinic, Prevention Service of the University of Alicante, Alicante, Spain

Purpose: To evaluate the intrasession repeatability of refractive and ocular aberrometric measurements obtained using a new multidiagnostic device in healthy eyes.
Patients and methods: A total of 107 eyes of 107 patients, age ranging from 23 to 65 years, were enrolled in this study. A complete eye examination was performed in all eyes, including an ocular examination using the VX120 system. Three consecutive measurements were obtained using this device to assess the intrasession repeatability of different refractive and ocular aberrometric parameters. The within-subject standard deviation (Sw), intrasubject precision (1.96×Sw), and intraclass correlation coefficient (ICC) were calculated.
Results: Sw and intrasubject precision for refractive data were below 0.12 and 0.20 D, respectively, in all cases. The ICC ranged from 0.947 for the J45 power vector component to 0.997 for the sphere. Concerning aberrometric measurements Sw and intrasubject precision values were below 0.05 µm and 0.10 µm, respectively. Likewise, the ICC ranged from 0.805 for the quadrafoil root mean square to 0.954 for the primary spherical aberration. Poor correlations were found between most of the refractive parameters and their Sw (–0.033≤r≤0.053, p≥0.064). Moderate and significant positive correlations were found between the magnitude of the aberrometric parameters evaluated and their Sw (r≥0.446, p<0.001).
Conclusion: The new multidiagnostic device evaluated is able to provide consistent measurements of refraction and ocular aberrations in healthy eyes. Future studies should confirm if this consistency is also observed in highly aberrated eyes.

Keywords: ocular aberrations, refraction, Scheimpflug imaging, VX120 system, intrasession repeatability

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