Comparison of axial length, keratometry and refraction between DNEye Scanner 2+ and Myopia Master

Abstract

Purpose. The aim of this study was to compare axial length outcomes between DNEye Scanner 2+ and Myopia Master. For this purpose the two available software modules Rodenstock Consulting and CNXT were used for axial length calculation. Axial length results of both software modules were compared with each other as well as with the results of the Myopia Master, which were used as a reference. In addition, keratometry readings and objective refraction between both devices were compared and the repeatability was evaluated. Material and Methods. In this prospective study 62 patients were enrolled and measured three times each with DNEye Scanner 2+ and Myopia Master. Axial length, keratometric readings and objective refraction were determined as well as a subjective refraction. One eye per individual was randomly selected and considered in this study. Results. The mean differences of axial length comparing Consulting and Myopia Master is 0.52 ± 0.53 mm, comparing CNXT and Myopia Master it is 0.07 ± 0.50 mm and comparing Consulting and CNXT it is 0.44 ± 0.23 mm. For the mean corneal refractive power the mean differences between DNEye Scanner and Myopia Master yielded 0.01 ± 0.24 and −0.10 ± 0.22 D for the spherical equivalent of the objective refraction. Conclusion. Due to the considerable scatter in axial length between DNEye Scanner 2+ and Myopia Master as a reference, results of Consulting and CNXT cannot be proposed for use in myopia management. Differences in keratometry readings and objective refraction are statistically significant but clinically irrelevant. Keywords Axial length, keratometry, DNEye Scanner, Rodenstock Consulting, CNXT, Myopia Master