Patterns of Pupillary Activity During Binocular Disparity Resolution.

This study examined the dynamic coordination between disconjugate, vergence eye movements, and pupil size in 52 normal subjects during binocular disparity stimulation in a virtual reality display. Eye movements and pupil area were sampled with a video-oculographic system at 100 Hz during performance of two tasks, (1) fusion of a binocular disparity step (±1.5° of visual angle in the horizontal plane) and (2) pursuit of a sinusoidally varying binocular disparity stimulus (0.

Oculomotor, Vestibular, and Reaction Time Effects of Sports-Related Concussion: Video-Oculography in Assessing Sports-Related Concussion.

Objective: The purpose of the study was to test the ability of oculomotor, vestibular, and reaction time (OVRT) metrics to serve as a concussion assessment or diagnostic tool for general clinical use.

Setting And Participants: Patients with concussion were high school-aged athletes clinically diagnosed in a hospital setting with a sports-related concussion (n = 50). Control subjects were previously recruited male and female high school student athletes from 3 local high schools (n = 170).

The use of oculomotor, vestibular, and reaction time tests to assess mild traumatic brain injury (mTBI) over time.

Objectives: The objective of this work is to examine the outcomes of a set of objective measures for evaluating individuals with minor traumatic brain injury (mTBI) over the sub-acute time period. These methods involve tests of oculomotor, vestibular, and reaction time functions. This work expands upon published work examining these test results at the time of presentation.

Oculomotor, Vestibular, and Reaction Time Tests in Mild Traumatic Brain Injury.

Objective: Mild traumatic brain injury is a major public health issue and is a particular concern in sports. One of the most difficult issues with respect to mild traumatic brain injury involves the diagnosis of the disorder. Typically, diagnosis is made by a constellation of physical exam findings.

A high speed eye tracking system with robust pupil center estimation algorithm.

This paper presents a new high-speed head-mounted binocular eye position measurement system using infrared lighting and image processing technology. Current eye tracking systems either run on-line at a lower speed, do the processing off-line, or use dedicated hardware to reach high on-line processing rates. The eye position measurement system we developed only uses a general-purpose computing system and off-the-shelf imaging devices.