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Some info for anyone thinking of going to the USA - the FAA has scrapped the Farnsworth Lantern Test (See FAA medical website).
9 out of 22 is a pass in Canada? How the hell can one country (or group of countries) stipulate NIL errors as a pass whereas another country will permit 2 errors, another 6 and another country allows lots?
Isn't it strange that one of the the only countries that doesn't permit any mistakes is the same country that publishes a document stating that the Ishihara tests and the lantern tests are unreliable!
HTH
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