Scoring 0% means you did not answer correctly on any of the test images targeting that cone. It does not mean that you can’t see that colour at all; rather, it just means that you have a strong defect in that cone.

Some score variability is to be expected, but if you get very different results on different devices, check if you have any colour filtering effects turned on, such as blue-light filtering or colour blindness assistive apps. These can significantly impact your scores. For the most accurate results, use the newest device you have access to.

Scoring less than 100% on more than one cone does not mean that you have more than one defective cone. Your defective cone is the one that you score lowest on. Sometimes, people also score below 100% on their non-defective cones. This is related to how the brain processes colour by combining the signals from different cones, which in some cases can make it more difficult to see images targeting a non-defective cone as well. Additionally, the blue cone can lose sensitivity as we age, leading to lowered scores.

The new test gives much more specific results for each cone, instead of broad categories like mild, moderate, and severe. Your score on your defective cone (red cone if you’re a protan, green cone if you’re a deutan, blue cone if you’re a tritan) is a measure of severity: the lower the score, the more severe your colourblindness.

Sometimes, in addition to seeing increased scores for their defective cone, people see a slight decrease to their non-defective cone scores while wearing the glasses. This is normal and does not indicate that you have the wrong lens for your colourblindness. You won’t notice this effect when wearing the glasses out in the real world.

Most colour blind people who take the new colour blind test while wearing EnChroma glasses see improvements to their defective cone scores. 

The Ishihara test, the old EnChroma test, and other online colour vision tests were developed only as broad colour vision screening assessments and did not use cone-specific colours. Therefore, they cannot show improvement to the individual cones. Only the new EnChroma Colour Blind Test can show this improvement.

If you score 0% on one of your cones both with and without the glasses, the chances are very high that you are a dichromat. This is a relatively rare form of colourblindness, where one cone type is completely missing. Dichromats generally do not see colour enhancement when wearing EnChroma glasses.

Other products on the market might help on the test, but none use EnChroma’s patented lens technology, instead manipulating relative lightness of colours. EnChroma lenses increase the colour contrast in the image, improving your ability to see the cone-isolated hidden symbol. These other lenses may or may not help your test scores but they won’t really help you see true colours.

The cone score percentages shown as part of our new test vary by up to +/-13% for most people, so your cone scores could change within that range when taking the test multiple times. If your scores vary by more than that, other factors may be affecting it such as screen brightness or using different devices.