Would be a whole lot easier for the "borderline" guys to qualify for Class1s if the CAA (and JAA) adopted the FAAs approach, ie, if you meet the acuity requirements corrected or otherwise, then the refraction is unimportant.
I am in a situation where I am corrected to 20/20 (6/6), and my current prescription is -0.5D, all very good you might say. However my pre-lasik prescription was ~-10D, and as such I seem to be ruled out of holding a Class1 on the basis I in the past, did not meet renewel requirements!