This test is for patients of the practice. Enter the access code your office gave you when your visit was arranged, then tap Continue.
If you don't have a code, please call the office and we will be glad to provide one.
This is a screening test, not a diagnosis. Results depend on your screen and lighting, and they do not replace an in-office color vision examination.
This screener follows the same idea as the in-office cone contrast test: it shows letters that only one kind of color-sensing cell (cone) can pick out, first boldly, then fainter and fainter. How faint a letter you can still read tells us how that cone system is working.
18 letters in all — six for each cone system, stepping down in contrast. There is also one practice plate first, which is not scored.
Used only on your report, so the office can match it to your chart.
Which eye are you testing first?Cover the other eye before you start. You can test the second eye afterwards from the results screen.
What letter do you see in the circle?
Keep the other eye covered the whole time. Don't squint, tilt the screen, or change your distance partway through — steady conditions make the result mean something. Your report — complete or incomplete — is prepared automatically for the office when the test ends.
| Patient | |
|---|---|
| Eye tested | |
| Date | |
| Report status | |
| Ordered by | Paddy Kalish, OD |
| Test | Online cone-contrast color vision screener (Rabin-style) |
Each score runs 0–100. On the calibrated in-office test, 75 and above is the usual normal range — the marker on each bar. Home screens vary, so treat these as screening numbers, not final measurements.
Screening only: this online test cannot diagnose a color vision deficiency, and a reduced score can be caused by screen settings, lighting, cataract, or other eye conditions as well as by the cones themselves. Any reduced result should be confirmed with the calibrated test in the office.