Assessment of tear film surface quality using dynamic-area high-speed videokeratoscopy

David Alonso-Caneiro; D. Robert Iskander; Michael J Collins

doi:10.1109/TBME.2008.2011993

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Assessment of tear film surface quality using dynamic-area high-speed videokeratoscopy

Journal article

Peer reviewed

Assessment of tear film surface quality using dynamic-area high-speed videokeratoscopy

David Alonso-Caneiro, D. Robert Iskander and Michael J Collins

IEEE Transactions on Biomedical Engineering, Vol.56(5), pp.1473-1481

2009

DOI: https://doi.org/10.1109/TBME.2008.2011993

PMID: 19174338

Abstract

cornea

image processing

tear film

high-speed videokeratoscopy (HSV)

A new method for noninvasive assessment of tear film surface quality (TFSQ) is proposed. The method is based on high-speed videokeratoscopy in which the corneal area for the analysis is dynamically estimated in a manner that removes videokeratoscopy interference from the shadows of eyelashes but not that related to the poor quality of the precorneal tear film that is of interest. The separation between the two types of seemingly similar videokeratoscopy interference is achieved by region-based classification in which the overall noise is first separated from the useful signal (unaltered videokeratoscopy pattern), followed by a dedicated interference classification algorithm that distinguishes between the two considered interferences. The proposed technique provides a much wider corneal area for the analysis of TFSQ than the previously reported techniques. A preliminary study with the proposed technique, carried out for a range of anterior eye conditions, showed an effective behavior in terms of noise to signal separation, interference classification, as well as consistent TFSQ results. Subsequently, the method proved to be able to not only discriminate between the bare eye and the lens on eye conditions but also to have the potential to discriminate between the two types of contact lenses.

Details

Title: Assessment of tear film surface quality using dynamic-area high-speed videokeratoscopy
Authors: David Alonso-Caneiro (Corresponding Author) - Queensland University of Technology
D. Robert Iskander (Author) - Queensland University of Technology
Michael J Collins (Author) - Queensland University of Technology
Publication details: IEEE Transactions on Biomedical Engineering, Vol.56(5), pp.1473-1481
Publisher: Institute of Electrical and Electronics Engineers
DOI: 10.1109/TBME.2008.2011993
ISSN: 1558-2531
PMID: 19174338
Organisation Unit: School of Science, Technology and Engineering
Language: English
Record Identifier: 99973597302621
Output Type: Journal article