FARNSWORTH LANTERN TEST
farnsworth lantern is a color vision test used to measure the ability of individuals to identify maritime and aviation signal lights.
FARNSWORTH LANTERN TEST
Test Completed
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WHAT IS THE FARNSWORTH LANTERN TEST?
The Farnsworth Lantern Test, or FALANT, is one of the best color vision tests initially developed to screen sailors for tasks requiring color vision, such as recognizing signal lights at night. This test screens for red-green deficiencies, but not the much rarer blue color deficiency.
HOW DOES THIS TEST WORK?
Lantern Test shows a pair of vertically oriented lights consisting of red, green, or yellow-white combinations. The user is asked to identify the two colors (some of which are identical).
There are Nine color pairs are administered during the test, and It begins with a red/green color combination to allow the user to see these two colors pair before seeing a white light, which decreases testing errors.
The test shows colors for only two seconds, as color-deficient people can sometimes correctly identify the colors with prolonged exposure.
Yellow-white color, or one of the identical paired of yellow and white color made a 50% neutral grey filter to reduce luminance cues to the color-deficient patient.
i.e: Up - red, down - green
i.e: Up - yellow, down - red
WHO NEEDS THIS TEST?
Defense recruitment, particularly for the Navy, Air Force, and Army, to ensure candidates meet vision standards.
Aviation, for assessing airline pilots and air traffic controllers.
Marine and shipping industries, where ship captains and crew must accurately identify signal lights and navigational markers.
Railway and transportation sectors, where color-coded signals play a crucial role.
