The Farnsworth Lantern Test (FALANT) is a color vision testing protocol that all pilots must go through upon receiving their flight license. The test can be taken online as a practise test but in order to be official, has to be taken at a certified clinic or center in the presence of a professional. The test checks to see whether or not a pilot is color blind. This is important because of the color coding used in the cockpit of the aircraft. The pilot must be able to see the colors and differentiate between them.