Visual Acuity Test
Estimate a rough Snellen-style visual acuity result such as 20/20 or 20/40 from the smallest line you can read. Get decimal acuity, logMAR context, screening guidance, and practical next steps for a home-style vision check.
Take a quick Ishihara-style color blindness test on screen using hidden-number dot plates. Get a rough color vision screening summary, answer pattern signals, and practical next steps for follow-up.
Take a quick on-screen color blindness test using Ishihara-style number plates to screen for possible color discrimination differences. For other eye checks, compare it with the Visual Acuity Test or the Eye Strain Calculator.
Look at each plate and choose the number you can see most clearly. If you cannot make out a number, choose “No number”.
Turn off night mode, color filters, and strong blue-light reduction before testing.
Avoid harsh glare or dim rooms so color contrast is easier to judge.
Finish the test on one screen, then compare with another screen only afterward.
The plates use dot patterns and hidden numbers to mimic a basic color discrimination screen.
The result separates general misses from rough red-green or blue-yellow plate patterns.
A mixed or weak score can suggest follow-up, but it does not diagnose the type or severity of deficiency.
A color blindness test screens how well you can distinguish certain color groupings, especially the red-green combinations that are commonly used in Ishihara-style plates. In those plates, a number is hidden inside many colored dots. If color contrast is harder to distinguish, the number may appear faint, different, or invisible.
This tool gives you a rough on-screen color vision screen, not a diagnosis. If you also want general eye-screening tools, browse the Eye Check & Assessment category.
The test shows several Ishihara-style dot plates. Each plate hides a number inside a colored dot pattern. You choose the number you can see, and the tool compares your answers with the expected plate answers to build a simple screening summary.
Keep the same device, brightness, and color settings while you move through the plate set.
Pick what you actually see instead of guessing what might be there.
The tool checks your responses across general, red-green weighted, and blue-yellow weighted plates.
The output highlights whether the quick screen looked stable, mixed, or worth following up with a more formal assessment.
Example: if you answer most general plates correctly but miss multiple red-green weighted plates, the tool may describe that as a mixed result with a rough red-green signal. That does not prove a specific deficiency type, but it can suggest that a more formal test would be useful.
If you want to compare chart reading rather than color discrimination, use the Eye Chart Simulator (Snellen) or the Visual Acuity Test.
Phones, tablets, and monitors do not show the same hues or saturation levels.
Blue-light reduction and accessibility color filters can change the plate contrast a lot.
Reflections and bright ambient light can wash out dot differences that matter.
Even two similar screens can render red, green, and yellow ranges differently.
Eye strain and tiredness can make subtle dot differences harder to pick out.
A real color vision assessment uses standardized materials and interpretation, not only on-screen plates.
Use it when you want a rough Snellen result rather than a color vision screen.
Helpful for displaying a chart preview while checking distance-vision lines.
Compare color-screening frustration with screen fatigue and symptom patterns.
Browse the full eye screening and assessment category.
No. It is Ishihara-style and intended for rough screening only. Clinical materials are standardized more carefully.
No. It can only suggest that your answer pattern may be worth following up with a formal test.
Because hue, brightness, saturation, white balance, and contrast vary significantly from one display to another.
No. Turn those off first, because they can shift the colors and make the plate easier or harder unfairly.
Choose “No number”. That is better than guessing, and it produces a more meaningful screening pattern.
Color Blindness Test is part of the Eye Check & Assessment collection. If you want a broader view of similar workflows, open the Eye Check & Assessment category page or browse all QuickTools categories.
Common next steps after this tool include Visual Acuity Test, Eye Chart Simulator (Snellen) and Astigmatism Test.
Estimate a rough Snellen-style visual acuity result such as 20/20 or 20/40 from the smallest line you can read. Get decimal acuity, logMAR context, screening guidance, and practical next steps for a home-style vision check.
Display a responsive Snellen-style eye chart on screen with full-chart and single-line modes, scaling controls, mirrored view, contrast options, and distance presets for rough home-style vision screening practice.
Use a clock-dial style astigmatism test to check whether some line orientations look darker, sharper, or blurrier than others. Get a rough screening summary and practical follow-up guidance for home eye checks.
Check how small a line of text you can read comfortably at a near reading distance. Get a rough reading-card style near vision summary and practical next-step guidance for home screening.
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