title: Determining the visual angle of objects in the visual field: an extended application of eye trackers.
abstract: Many eye-tracker systems display the point of central gaze fixation on video images of the viewed environment. We describe here a method for determining the visual angles of objects located in the periphery. Such data are needed to study the potential contributions of peripheral vision during cognitive and motor tasks.
authors.affiliation: Centre for Studies in Aging, Sunnybrook Health Sciences Centre, Toronto, ON M4N 3M5, Canada.
authors.forename: Carol Y
authors.initials: CY
authors.lastname: Scovil
authors.forename: Emily C
authors.initials: EC
authors.lastname: King
authors.forename: Brian E
authors.initials: BE
authors.lastname: Maki Ast
mesh_terms: D000465:Algorithms; D005133:Eye Movements / Q000502:physiology*; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008962:Models, Theoretical; D014741:Video Recording; D058609:Visual Field Tests / Q000379:methods*; D014794:Visual Fields / Q000502:physiology*