1. From the Division of Pediatric Ophthalmology, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania; the2Department of Ophthalmology, Scheie Eye Institute-University of Pennsylvania, Philadelphia, Pennsylvania; the
2. From the Division of Pediatric Ophthalmology, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania; the
3. Department of Ophthalmology, Scheie Eye Institute-University of Pennsylvania, Philadelphia, Pennsylvania; the
4. The Children’s Hospital, Dublin, Ireland; and the
5. Pennsylvania College of Optometry, Philadelphia, Pennsylvania.