If you fail a color vision test, you can still become a pilot. However, you'll be limited to daytime operations and won't be able to fly at night or accept ATC color signals.
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Upon joining the Navy, you must: Meet specific eyesight requirements: 20/40 best eye; 20/70 worst eye; correctable to 20/25 with no color blindness.
Yes, airplane pilots can wear glasses. (And many do.) If you wear eyeglasses or contact lenses, you can still become a commercial, private, or military pilot. The Federal Aviation Administration (FAA) and the military have certain minimum standards for prospective pilots.