6/9 and 6/6 are not mentioned, that's why I was wondering...
In JAR-FCL 3 there's a part that says:
Visual acuity must be with or without correction 6/9 or more in each eye and binocular visual acuity 6/6 or more. No limits must be applied to uncorrected visual acuity.
Oh, I want to ask another question: is it possible to wear contact lenses during the examination?
I ask this because sometimes I feel more comfortable with contact lenses and with my left eye, which requires an correction for astigmatism of more than 2 dioptres (-2,75 if contact lenses; -3 dioptres if spectacle).