Kathy
Color bli9ndness and color deficiency are two different things. Many
men have the later and not at all uncommon. For women and color
blindness I guess its a different thing? The SODA is simply a test for
white/green/red and one that I did back about 1970 after I had already
done numerous 1st class physicals! Did the light test at the tower with
a FSDO Inspector, passed it and have flown with that SODA ever since.
If you are indeed unable to see the difference in white/red/green, it
only keeps you limited to daytime flying, and not into controlled
fields that require light signals for no radio. Not a big deal.
Good luck
Ol Shy & Bashful
50+ years of flying 22,000+ hours