The Pediatric Vision Screener

for simultaneous detection of ocular alignment and focus in young children

Version, 2012

Amblyopia (lazy eye) is a form of visual impairment caused by ocular misalignment (strabismus) or defocus in an otherwise normal eye. If detected early, the condition can be fully treated, yet over half of all children with amblyopia under age 5 escape detection. We have developed the Pediatric Vision Screener (PVS), a device that automatically detects the amblyopia risk factors of ocular misalignment and defocus in human subjects in one quick measurement. The PVS utilizes binocular retinal birefringence scanning (BRBS) to detect strabismus, and a bullís-eye-detector-based focus detection system to detect defocus simultaneously for both eyes.

In a preliminary pilot study in adults, normal alignment was detected in all control subjects, while all strabismic adults and children failed the screening test.

This work was supported by a Hartwell Foundation Individual Biomedical Research Award 2009(Boris Gramatikov), Research to Prevent Blindness, The Alcon Research Institute, The Helena Rubenstein Foundation, The Whitaker Foundation for Biomedical Engineering, The Thomas Wilson Sanitarium for the Children of Baltimore City, and by contributions from Janet and Dewey Gargiulo.

Development stages: