Description
Plastic
Beads
Nylon
String
Beads
wood
Therapeutic
heavier cords
About Farnsworth D-15 color blind test
- D-15 dichotomous test was originally introduced in 1947 by Mr. Farnsworth. The D-15 test is a so called arrangement test. This type of color blindness tests are based on a set of colored plates or discs which have to be arranged in the correct order.
- Colorblind people will have difficulties to arrange the given colors and make mistakes. Based on this mistakes and the resulting confusion vector, the type of your color blindness and as well its severity can be calculated. Some studies show only 53.5% sensitivity (but 100% specificity) compared to the “standard gold” anomaloscope.
FarnsworthMunsell 100 Hue Test
- The D15 set is a modification of the well-known FarnsworthMunsell 100 Hue Test. The D15 test is intended for classification instead of more time-consuming in-depth study of color vision defects using the 100-Hue test.
- Each D15 set contains a reference disc and fifteen numbered discs, which make up an incomplete color circle. Following an attempt to sequentially arrange the discs by the patient, evaluation determines color perception or defects in deutan, protan or tritan axis discrimination.
| Topic | Discription |
| Catagory | Color Vision Test |
| Material | Discs are made of printed color surfaces (no coating), and stored in a clear hard plastic case. |
| Item Weight | The full set weighs about 0.45 kg — lightweight and easy to carry. |
| Size | Standard discs are small and easy to handle. Larger discs are available for kids or low vision patients. |
| How to use for | Needs to be done under good lighting. Can be used on one eye or both depending on the test. |
| What’s Inside | Comes with 15 colored discs plus 1 fixed reference disc. The patient arranges them in color order. |
| Purpose | Used to check for color vision problems (like red-green or blue-yellow issues). Helps detect both inherited and acquired color vision defects. |
| Durability | It’s delicate — colors can fade or get scratched if not handled carefully. Avoid fingerprints or strong light. |
| Unique Selling Proposition (USP) | Faster and simpler than more advanced tests. Good for quick color vision screening. |
| Storage | Should be stored in its case, away from light and heat, to keep the colors from fading. |
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