RightEye, BTrackS, CRMA, and Neurocognitive Testing: Uses, Limitations, and Clinical Context

Technology can make parts of an injury evaluation more measurable, but technology does not remove the need for clinical judgment. Each tool answers a different question, has different limitations, and must be interpreted in context.

RightEye: oculomotor and visual performance

Computerized eye-tracking can measure aspects of smooth pursuit, saccades, fixation, and reaction time. In a patient with dizziness, visual intolerance, headache, reading difficulty, or suspected post-concussion involvement, those measures may add useful functional information.

Limitations matter. Oculomotor performance can be influenced by vision problems, fatigue, medication, neurologic history, attention, pain, sleep, and other factors. An abnormal result does not by itself diagnose concussion or prove that a crash caused the abnormality.

BTrackS: balance and postural stability

Force-plate balance testing can quantify postural sway and provide a standardized way to compare performance over time or against reference data. This can be useful when a patient reports dizziness, unsteadiness, or balance difficulty.

Balance is influenced by vestibular, visual, neurologic, musculoskeletal, medication, fatigue, and environmental factors. An abnormal score should prompt interpretation, not a single-cause conclusion.

CRMA: computerized radiographic mensuration

Computerized radiographic mensuration measures relationships and motion on radiographs, including flexion-extension studies when clinically indicated. It can help quantify intersegmental motion and contribute to the evaluation of suspected instability.

Image quality, positioning, patient effort, technique, degenerative change, prior injury, and the clinical indication all matter. A measured abnormality must be interpreted with the examination and other imaging. It does not automatically establish that a collision caused the finding or that the patient requires a specific legal impairment rating.

Neurocognitive screening

Computerized neurocognitive assessment can measure domains such as processing speed, attention, memory, and reaction time. It may be useful as part of a broader post-concussion screening or monitoring process.

Performance can be affected by education, language, sleep, pain, mood, medication, effort, prior neurologic conditions, and other variables. Results should not be used in isolation to diagnose traumatic brain injury.

The common rule for all four tools

The same principle applies across technologies: use the tool because there is a clinical question, understand how the measure was obtained, know what factors can influence it, and state clearly what the result can and cannot establish.

When used that way, technology can improve documentation and clinical decision-making without being presented as more certain than the evidence supports.