Free 3-minute screening • Not a diagnostic device — a tracking tool
Tracking vision changes after a brain injury
A calibrated contrast sensitivity screening test. Three minutes, a free account, first test free, results saved to your account.
Take the testFirst test free • 3 minutes • Free account • Phone, tablet, or laptop.
Why CSF tracking for TBI recovery.
TBI commonly affects the visual pathways. Many patients “pass” a standard acuity exam but have subtle mid-spatial-frequency contrast loss that lines up with persistent symptoms.
Recovery is often non-linear. A single CSF reading is one data point; the SHAPE of CSF over weeks or months is the signal worth tracking.
Take it now to set a baseline. Retake at 1 week, 4 weeks, 3 months. Bring trend graphs to a neuro-optometrist.
What this test can and can’t tell you.
It can
- Surface mid-frequency contrast changes that often follow TBI.
- Track recovery (or persistent symptoms) over weeks and months.
- Provide data for a neuro-optometric specialist — who is the right kind of clinician.
It can’t
- Does not diagnose TBI or post-concussion syndrome.
- Does not replace a comprehensive neuro-optometric evaluation, VOMS, or vestibular testing.
- Single-session variance is real — trends matter, not one number.
The longer read.
We’ve written about this in depth — with citations and a “what the science says vs. what we don’t know” section.
Vision changes after a concussion: when CSF tells you something→Take the test
First test free, 3 min. Free account. Results saved to your account.