If it's any consolation to people, a million years ago I failed the Ishihara test but, passed the lantern test and started a very enjoyable career as a RN Helicopter pilot..
More recently while working in SE Asia under different license, I failed the plate test (as I always do) but, passed another lantern test (they wouldn't accept the military test)...
The plates are just a basic test, the lantern test is the definitive.
VTA