About the Authors

Dipesh E. Patel

Affiliations Life Course Epidemiology and Biostatistics Section, UCL Institute of Child Health, London, United Kingdom, Ulverscroft Vision Research Group, London, United Kingdom, Moorfields Eye Hospital NHS Foundation Trust, London, United Kingdom, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom

Phillippa M. Cumberland

Affiliations Life Course Epidemiology and Biostatistics Section, UCL Institute of Child Health, London, United Kingdom, Ulverscroft Vision Research Group, London, United Kingdom

Bronwen C. Walters

Affiliations Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom, Ulverscroft Vision Research Group, London, United Kingdom

Isabelle Russell-Eggitt

Affiliation Ulverscroft Vision Research Group, London, United Kingdom

Jugnoo S. Rahi

j.rahi@ucl.ac.uk

Affiliations Life Course Epidemiology and Biostatistics Section, UCL Institute of Child Health, London, United Kingdom, Ulverscroft Vision Research Group, London, United Kingdom, Moorfields Eye Hospital NHS Foundation Trust, London, United Kingdom, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom, UCL Institute of Ophthalmology, London, United Kingdom

OPTIC study group

OPTIC study group members are listed in the Acknowledgments.

Competing Interests

The authors have the following financial declarations: An Octopus perimeter was loaned to Great Ormond Street Hospital by Haag-Streit (AG, Switzerland) for use in this study. This does not alter the authors’ adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: DEP PMC BCW IRE JSR. Performed the experiments: DEP. Analyzed the data: DEP PMC. Contributed reagents/materials/analysis tools: DEP PMC BCW IRE JSR. Wrote the paper: DEP PMC BCW IRE JSR.