Apparatus for examining gaze shift in depth direction

Details Apparatus for examining gaze shift in depth direction Apparatus for examining gaze shift in depth direction

A - Human Necessities

61

B

A61B 5/113 (2006.01) A61B 3/113 (2006.01)

Patent

CA 2090358

In an apparatus for examining gaze shift in depth direction, light emitting diodes B and E, or D and C are lit at a plurality of positions with different distance in depth direction from the subject, and eye movement of the subject at that time is detected by an eye movement detecting portion (2). The signal of detection is processed in a signal processing circuit (5) and is applied to a calculating portion (1). The calculating portion (1) determines whether or not there is a disorder in gaze shift in depth direction of the subject by using any or all of latency in eye movement, time constant, amplitude, change in convergence angle, number of occurrence of saccade, and asymmetry of left and right eye movements, in response to the detected output of the eye movement.

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