Dynamic visual vestibular acuity testing protocol
A compact neuro-otologic testing device and method provides an image producing laser with a right hand, servo controlled galvanometric based XY interface. The high quality closed loop servo control system that can drive the target (i.e. the laser image) in excess of 1,000,000 degrees/second 2 and at velocities in excess of 12000 degrees/second. The bandwidth of the XY interface is greater than 400 Hz, providing high image reproducibility. The repeatability and position accuracy of the target is +−3 arc-seconds and the field of range of the XY interface are about 60 degrees (i.e. about 60 degrees horizontal and 60 degrees vertical).
1. A Dynamic Visual Vestibular Acuity Testing protocol of for testing an observer's ability to resolve a critical detail in a visual target under conditions of relative movement, said protocol comprising the steps of
providing passive oscillation movement to the patient during testing through a movement mechanism; and
displaying a laser based visual optotype images in the form of a non-circular optotype as a visual target to the patient during testing from a testing device including a housing having a laser opening therein and mounted on the mechanism for providing passive movement to the patient, an image producing laser mounted within the housing adapted to project through the laser opening to form the visual target image for testing the observer's ability to resolve a critical detail in the visual target under conditions of relative movement, wherein the laser forming the image is controlled by a galvanometric based XY interface having a closed loop servo control system that can drive the image in excess of 1,000,000 degrees/second 2 and at velocities in excess of 12000 degrees/second.
2. A Dynamic Visual Vestibular Acuity Testing protocol of for testing an observer's ability to resolve a critical detail in a visual target under conditions of relative movement, said protocol comprising the steps of
providing passive oscillation movement to the patient during testing through a movement mechanism; and
displaying a laser based visual optotype images in the form of a non-circular optotype as a visual target to the patient during testing from a testing device including a housing having a laser opening therein and mounted on the mechanism for providing passive movement to the patient, an image producing laser mounted within the housing adapted to project through the laser opening to form the visual target image for testing the observer's ability to resolve a critical detail in the visual target under conditions of relative movement, wherein the laser forming the image is controlled by an XY interface that can drive the image in excess of 1,000,000 degrees/second 2 and at velocities in excess of 12000 degrees/second, and wherein each optotype image can be displayed in at least two visually distinct orientations.