Eye Movement Flashcards
Are concussion devices class 1 or 2?
any concussion diagnostic device will be class 2.
What is the frequency of a fixation?
3 per second
3 Hz
Are concussioon devices approved or cleared?
FDA “cleared”
class 2
What is the speed of a smooth pursuit
Up to 30 degrees per second
If a eye-tracking device was rated at 30 Hz what would that mean?
It can capture 30 images per second
What is the measurement unit for eye-tracking?
The Hertz or Hz
What is the speed and frequency of a saccade?
Up to 600 degrees per second
Typical freqency 4 times per second
What is the K-D Test?
King-Devak is a rapid visual performance measure,
standardized eye tracking
can be used on sidelines by nonmedical personnel, including parents of
youth athletes.
Value of SCAT-3 and K-D Test?
The K–D test complements components of
the SCAT3 and improves the detection of concussions.
What portion of the brain controls saccadic eye movements?
The parietal lobe and more particularly its posterior part, the PPC, are involved in the control of saccades and attention
For Eyesync what is SDRE?
Space errors
SD of Radial Errors
Perpendicular to target trajectory
(Orthogonal)
For Eyesync what are SDTE?
Time Errors
SD of Tangential errors
along target trajectory
Time error
What is a Radial Error?
Space error
Standard Error of Mean (VARIANCE) between the gaze and the target position PERPENDICULAR to the target trajectory.
What is Tangential Error?
Standard Error of Mean (VARIANCE) between the gaze and the target position ALONG the target trajectory.
Time Error
What is the PHASE error?
The average phase error between the subject’s gaze position and the target position.
