Submitted for Publication: December 8, 2010; final revision received June 27, 2011; accepted June 29, 2011.
Financial Disclosure: None reported.
Funding/Support: This study was supported in part by the Children's Hospital Ophthalmology Foundation. The statistical work was conducted with partial support from Harvard Catalyst, The Harvard Clinical and Translational Science Center, by award UL1 RR 025758 from the National Institutes of Health and financial contributions from Harvard University and its affiliated academic health care centers.
Disclaimer: The content is solely the responsibility of the authors and does not necessarily represent the official views of Harvard Catalyst, Harvard University and its affiliated academic health care centers, the National Center for Research Resources, or the National Institutes of Health.
Previous Presentation: This study was presented at the American Association for Pediatric Ophthalmology and Strabismus Meeting; April 17, 2011; San Diego, California.
Additional Contributions: Sarah Mackinnon, OC(C), MSc, lead orthoptist, Department of Ophthalmology, assisted with orthoptic measurements and interpretation of head turn photographs. Ethan Bickford, BFA, formatted the clinical images. Peter Forbes, MA, senior biostatistician, Children's Hospital Boston, helped with statistical analysis.