Without getting into the specifics of your case which I have no authority to comment upon, there clearly are many specified minimums to achieve the required standards.
As dissapointing as it might be, they are set not only to stop you wasting time and money, but also to protect the potential employers who would also stand to lose their investment. Of course you cannot guarantee that any fit individual will still be so tommorow, but there has to be a degree of probability and common sense applied. The limits set would normally allow for the usual wear and tear, in other words the deterioration that the onset of advancing age would normally result in. The limits are therefore either age dependant or applied at a sensible mean level to cover a range of ages.
There are many posts on PPRuNe that discuss eyesight and other issues in depth and it is well reported that the authority often takes a pragmatic and helpful approach to these issues. You should however be aware that not everybody will satisfy the standards and that is just a fact of life however unfortunate that may be.
Good luck.