that's because the ishihara test plates at gatwick are old and faded, and thats how they pay the game, ive had the plates done again with an optician that i dont know so there is no faulse recording and full 15/15,
i do wonder how the optometrist at gatwick feels when he knows that he is failing people, every time i had a renewal for faa i had to redo the book, and the same little marks and tears on the book confirm the plates or book are not replaced as advised, and im talking about seeing this book over a person of 3-5 years, not only is he failing the pilots over this, also failing professionally as a health provider.
