My EASA Medical is similarly stamped, with the requirement to carry a spare.
It seems to be assumed these are the ones with which passed the test.
AFAIK there is no regulation stating that the glasses used to pass the medical are used to fly the plane. This has got to be the biggest clue to solving these issues.
I got additional writing by my Medical examiner that glasses are needed, juist that the restriction is applicable (oh, well if that is wat makes them happy). I will show them this email if there is an issue. It is just a strange and typicle piece of useless legislation!
Peter wrote:
AFAIK there is no regulation stating that the glasses used to pass the medical are used to fly the plane.
No, there is not – and such a regulation would be extremely impractical, as e.g. you would typically not take the medical wearing sunglasses…
However, to fulfill the medical restrictions you need to wear glasses that actually correct your visual impairment – therefore while you don’t have to wear the glasses you used while passing the medical, you have to wear some with which you would pass it.