Journal article

Comparison of sorting algorithms to increase the range of Hartmann-Shack aberrometry

Phillip Bedggood, Andrew Metha

JOURNAL OF BIOMEDICAL OPTICS | SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS | Published : 2010

Abstract

Recently many software-based approaches have been suggested for improving the range and accuracy of Hartmann-Shack aberrometry. We compare the performance of four representative algorithms, with a focus on aberrometry for the human eye. Algorithms vary in complexity from the simplistic traditional approach to iterative spline extrapolation based on prior spot measurements. Range is assessed for a variety of aberration types in isolation using computer modeling, and also for complex wavefront shapes using a real adaptive optics system. The effects of common sources of error for ocular wavefront sensing are explored. The results show that the simplest possible iterative algorithm produces comp..

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