About the Authors

David B. Elliott

d.elliott1@bradford.ac.uk

Affiliation Bradford School of Optometry & Vision Science, University of Bradford, Bradford, West Yorkshire, United Kingdom

Anna Vale

Affiliation Bradford School of Optometry & Vision Science, University of Bradford, Bradford, West Yorkshire, United Kingdom

David Whitaker

Affiliation Bradford School of Optometry & Vision Science, University of Bradford, Bradford, West Yorkshire, United Kingdom

John G. Buckley

Affiliation School of Engineering, Design, & Technology, University of Bradford, Bradford, West Yorkshire, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: DE DW JGB. Performed the experiments: AV. Analyzed the data: DE AV DW JGB. Wrote the paper: DE AV DW JGB.