Ms. Cathleen Fedtke Profile

Cathleen Fedtke

at Brien Holden Vision Institute

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Proceedings Article | 9 March 2012 Paper

Validation of a quasi real-time global aberrometer: the EyeMapper

C. Fedtke, K. Ehrmann, D. Falk, B. Holden

Proceedings Volume 8209, 82090C (2012) https://doi.org/10.1117/12.906927

KEYWORDS: Eye, Refraction, Visualization, Eye models, Imaging systems, Retina, Wavefront sensors, Mirrors, Wavefronts, Light scattering

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Interest in measuring peripheral refraction rapidly and accurately has been stimulated by increasing evidence that the eye's peripheral refractive state can influence axial growth. In response to this, a new clinical instrument, the EyeMapper, was developed which performs quasi real-time global (central and peripheral) refraction measurements of the human eye. The EyeMapper is an aberrometer comprising a unique deflection system to permit an extremely rapid visual field scan. Refraction measurements are taken from -50° to +50° in 10° steps within 0.45 seconds. Multiple pupil imaging paths through the deflection system provide improved lateral and axial pupil alignment, and by rotating the instrument around its main optical axis, global power maps of the eye can be generated. Using a model eye with a pivoting and translating reflective surface to simulate the peripheral and central retina, the EyeMapper was cross-validated against a conventional aberrometer (COAS-HD, Wavefront Sciences, USA) and an autorefractor (Shin-Nippon NVision K5001, Japan). In addition, the right eyes of ten participants were measured across the horizontal visual field and in one eye, refraction measurements were performed globally. Overall, the EyeMapper showed good agreement and improved repeatability when compared to the other two instruments.

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