If you hadn't failed the eye test you'd be on your way to a fourth great career.
But you did and you're not - probably not intentional but everything you've posted (in either thread) has a tinge of sour grapes and that is why you need to let go.
Move on.
This forum is full of (probably perfectly capable would-be drivers) who have unfortunately fell at any number of hurdles - their cry of 'flawed testing' is common.
Don't join them
On a slightly more serious note - if you really want a place on the footplate, try again.
It might prove your point but, even more importantly, it will lead onto a great career with excellent earning potential (if you choose the right company), brilliant pension and annual leave that shocks even school teachers.
As way of encouragement, I know several qualified drivers who, after decades in the seat and with many medicals passed without issue, went on to fail the ishihara test.
All within a few days of each other and all at the same practise.
After several concerned calls from managers it was found that the 'plates' had been left on a window sill in baking heat during summer months and had faded!
New equipment = 100% pass.