Final answer:
The Farnsworth Lantern test is a color vision test that gives a pass/fail result and can detect protan and deutan deficiencies but does not measure their severity.
Step-by-step explanation:
The Farnsworth Lantern test is a type of color vision test that is used primarily to screen individuals for specific types of color vision deficiencies. The test is designed to produce a pass/fail result and can detect the presence of protan (red) and deutan (green) color vision deficiencies. However, it does not measure the severity of these deficiencies.
During the Farnsworth Lantern test, individuals are asked to identify the colors of two small lights, usually red, green, or a combination of both. Mistakes in identifying these colors can indicate a color vision deficiency. But again, while the test can identify the presence of a protan or deutan deficiency, it does not provide a measurement of how severe the deficiency is.
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