A handheld screening device that detects subtle misalignment of the eyes accurately identifies children with amblyopia (lazy eye), according to a study published online on July 9, 2021 in the Journal of the American Association for Pediatric Ophthalmology and Strabismus. “The findings suggest that pediatricians and other primary care providers could use the device to catch amblyopia at an early age when it’s easier to treat,” said Michael F. Chiang, MD, Director of the National Eye Institute (NEI), which supported research and development of the device. NEI is part of the National Institutes of Health. Dr. Chiang was not involved in the research. Amblyopia is impaired vision in one eye and it is the leading cause of preventable monocular (single eye) vision loss, affecting three of every 100 children in the U.S.