A free, calibrated screening for self-tracking
Contrast sensitivity in multiple sclerosis
A free, calibrated contrast sensitivity screening test. Three minutes, no signup, results stay on your device.
Take the testFree • 3 minutes • No signup • Phone, tablet, or laptop.
Why this test, for MS.
Multiple sclerosis commonly affects the visual pathways, even outside of an acute optic neuritis episode. Contrast sensitivity is a sensitive probe of how the optic nerve and post-retinal pathways are currently working.
Even after an optic neuritis attack appears to “resolve” on standard acuity, contrast sensitivity often shows persistent changes. This is one reason low-contrast letter acuity has been adopted as a secondary endpoint in MS clinical trials.
Track contrast monthly — across treatment changes, relapses, or simple curiosity. Bring the trend to a neuro-ophthalmology visit alongside your clinic measurements.
What this test can and can’t tell you.
It can
- Surface contrast sensitivity changes that don’t show on a Snellen exam.
- Track over time across treatment changes, relapses, or recovery periods.
- Provide trend data for a neuro-ophthalmology or neurology visit.
It can’t
- Diagnose MS or any optic-pathway condition.
- Replace OCT, MRI, or a neurological exam.
- Match per-eye sensitivity yet — v0 is binocular; single-eye testing (more sensitive to optic-pathway asymmetry) is coming.
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.
Contrast sensitivity in MS: what the research says→Take the test
Free, 3 min. No signup. Results stay on your device.