About the Authors

Christian Quaia

quaiac@nei.nih.gov

Affiliation Laboratory of Sensorimotor Research, National Eye Institute, Bethesda, Maryland, United States of America

Howard S. Ying

Affiliation Wilmer Eye Institute, Department of Ophthalmology, The Johns Hopkins Hospital, Baltimore, Maryland, United States of America

Lance M. Optican

Affiliation Laboratory of Sensorimotor Research, National Eye Institute, Bethesda, Maryland, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CQ HSY LMO. Performed the experiments: CQ HSY LMO. Analyzed the data: CQ LMO. Wrote the paper: CQ LMO.