About the Authors

James Heron

j.heron2@bradford.ac.uk

Affiliation Bradford School of Optometry and Vision Science, University of Bradford, Bradford, United Kingdom

James V. M. Hanson

Affiliation Bradford School of Optometry and Vision Science, University of Bradford, Bradford, United Kingdom

David Whitaker

Affiliation Bradford School of Optometry and Vision Science, University of Bradford, Bradford, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JH JVMH DW. Performed the experiments: JH JVMH DW. Analyzed the data: JVMH DW. Wrote the paper: JH JVMH DW.