Farnsworth lantern test pdf 2025

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The online test indicates 0 error points for 15 correct hits. Only 2 error points are allowed to pass the test.
The test consists of showing 9 pairs of vertically oriented lights. Combinations of either red, green or yellow. Identify the colors up and down (some of which are identical). The colors are shown for only two seconds.
A passing test is no mistakes in the first nine pairs, or only two mistakes in the eighteen presentations shown to the examinee.
**The current passing score is 12 correct of 14 red/green test plates (not including the demonstration plate). Research has shown that scores below twelve indicate color vision deficiency, and twelve or more correct indicate normal color vision, with 97% sensitivity and 100% specificity.
Superior (Good) Score: About 16% of the population make 0 to 4 transpositions on the first test, or total error scores of zero to 16. This is a superior range of competence for color discrimination. Average (Normal) Score: About 68% of the population score between 16 and 100 on first tests.