Completely agree with all of that . . . . . ! (with the proviso that the basic Ishihara plates are still the primary test usually used - lantern testing is reserved for those who fail them).
My question is was the AME incorrect in getting me to read the plates through coloured lenses as the cost to me of changing the glasses was around the £200 mark ?
I believe he probably was incorrect in doing so. To repeat my query . . .
Can you (or your AME, who told you) explain just WHICH regulations require that ? This is news to me