Patents Assigned to BID Instruments Limited
  • Apparatus and method for visual field testing
    Patent number: 6367932
    Abstract: An apparatus for ocular is provided wit means (2, 3) for displaying targets (T1, T2) means (4) for tracking eye movement and means (5) for controlling the display of targets (T1, T2) on a screen. A method comprises arranging the control means (5) to choreograph display of the targets (T1, T2 . . .) at different positions at the screen (2) depending on whether the eye tracking means (4) detects that an observer is directly looking at the target.
    Type: Grant
    Filed: June 27, 2000
    Date of Patent: April 9, 2002
    Assignee: BID Instruments Limited
    Inventor: William Blair Macgregor Donaldson
  • Method and apparatus for ocular motility testing
    Patent number: 5838420
    Abstract: Apparatus for ocular motility testing comprising, an item of headgear 5 onto which is mounted: gaze-detection means 25 for determining the visual axis directions of one or both eyes of an observer 14 wearing the headgear in relation to a reference primary position; and projector means 10 for projecting a target onto a screen spaced from the observer.
    Type: Grant
    Filed: May 21, 1996
    Date of Patent: November 17, 1998
    Assignee: BID Instruments Limited
    Inventor: William Blair MacGregor Donaldson