title: Automated detection of ocular alignment with binocular retinal birefringence scanning.
abstract: We previously developed a retinal birefingence scanning (RBS) device to detect eye fixation. The purpose of this study was to determine whether a new binocular RBS (BRBS) instrument can detect simultaneous fixation of both eyes. Control (nonmyopic and myopic) and strabismic subjects were studied by use of BRBS at a fixation distance of 45 cm. Binocularity (the percentage of measurements with bilateral fixation) was determined from the BRBS output. All nonstrabismic subjects with good quality signals had binocularity >75%. Binocularity averaged 5% in four subjects with strabismus (range of 0-20%). BRBS may potentially be used to screen individuals for abnormal eye alignment.
authors.affiliation: Zanvyl Krieger Children's Eye Center at the Wilmer Institute, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21287, USA. david.hunter@tch.harvard.edu
authors.forename: David G
authors.initials: DG
authors.lastname: Hunter
authors.forename: Ankoor S
authors.initials: AS
authors.lastname: Shah
authors.forename: Soma
authors.initials: S
authors.lastname: Sau
authors.forename: Deborah
authors.initials: D
authors.lastname: Nassif
authors.forename: David L
authors.initials: DL
authors.lastname: Guyton
mesh_terms: D001331:Automation; D001718:Birefringence; D004867:Equipment Design; D005403:Fixation, Ocular; D055095:Optics and Photonics / Q000295:instrumentation; D015348:Vision, Binocular / Q000502:physiology*