Color Blindness Test with Ishihara-Style Plates

It provides a browser-based screening for possible red-green color-vision differences using original generated dot plates. It does not diagnose a medical condition or replace a professional eye examination.

No. The page uses original Ishihara-style pseudoisochromatic dot plates and does not reproduce an official clinical Ishihara plate set. A validated test administered under controlled conditions is required for formal assessment.

It is a circle made from many colored dots, with some dots forming a number or shape. People with certain red-green color-vision differences may find the hidden figure harder to distinguish.

No. It is a screening aid only. Display calibration, lighting, eyesight, attention and the generated plate design can affect the result. An optometrist or ophthalmologist can perform validated testing.

The screening is designed around red-green color discrimination. It is not intended to evaluate blue-yellow deficiencies, complete color blindness or every acquired color-vision problem.

Those settings alter displayed colors and can make dot plates easier or harder to read. Use the normal display color mode for a more meaningful screening.

Use a comfortable normal brightness where white areas are clear but not glaring. Very dim or extremely bright settings can reduce color discrimination.

Both eyes is suitable for a general personal screening. Testing each eye separately can reveal a difference between eyes, but any one-eye concern should be discussed with an eye-care professional.

Yes. Use a modern mobile browser, keep the screen at a comfortable distance, disable color filters and avoid tilting the display. A larger screen may make subtle plates easier to judge.

Yes. Color gamut, white balance, brightness, viewing angle, privacy screens, damaged pixels and display profiles can change how the plates appear.

The control plate uses strong light-and-dark contrast rather than red-green separation. Missing it suggests that setup, visibility, attention or another factor may make the screening result unreliable.

Choose No number. Do not guess unless you can identify a specific number.

Choose Not sure. The result records uncertain responses separately and may recommend repeating the screening.

Yes. Use Previous Plate to review and change earlier responses before completing the screening.

Quick screening uses 8 plates, Standard uses 12 and Extended uses 18. Each version includes a neutral control plate.

Generated plates provide an original browser-based screening experience without reproducing a published clinical plate set. The generated result remains a non-diagnostic screening.

A high score with a correct control plate means no obvious red-green difficulty appeared in this particular screen. It does not guarantee normal color vision under validated clinical testing.

It means several plates were missed or uncertain, but the pattern is not strong enough for a clear screening interpretation. Repeat under good conditions or seek professional testing when color vision matters.

It means the response pattern showed substantial difficulty with the generated red-green plates. It is not a diagnosis, and a validated eye examination is the appropriate next step.

Yes. Eye strain, glare, dry eyes, poor focus and fatigue may reduce performance. Rest your eyes and repeat later when needed.

Ordinary clear corrective lenses usually help by improving focus. Tinted lenses, color-enhancing filters or sunglasses can alter plate colors and should not be used for the screening.

A child who can reliably identify numbers may try it with adult supervision, but formal pediatric color-vision assessment should use an age-appropriate validated test administered by a professional.

Some color-vision differences are inherited, while acquired changes can occur with eye disease, injury, neurological conditions or certain medicines. A new or one-sided change warrants professional evaluation.

Usually not. Most color-vision deficiency involves difficulty distinguishing particular color ranges, especially red and green, while complete absence of color perception is rare.

No. Occupational, licensing and medical requirements normally specify validated tests and controlled administration. Use the required official assessment.

No page-specific database or server endpoint stores the answers. The current screening state remains in browser memory until reset, navigation or page closure.

No page-specific account, installation, camera, microphone or sensor permission is required.

Yes. After completing the screening, download a plain-text summary with a correctioncopy.com_ filename, copy the summary or print the result.

Plate order, attention, lighting, viewing distance, display settings and uncertainty can change performance. Repeated inconsistent results are a reason to use validated professional testing.

Seek professional advice when color discrimination causes concern, when results remain abnormal after a careful repeat, when one eye differs from the other, or when color vision changes suddenly.