Failed?
I beleive you performed ortho k treatment, but just like another member said it is not a disqualifier.
Look at the legislation-http://www.jaa.nl/jar/jar.html
and press the fcl airplanes link.
ortho k is not surgery, and your eyes can go back to what they where, but what is the purpose.
There are pilots flying class 1 with ortho-k tretments (FAA) and the complications to their eyes where none.
Obviously it depends on the job performed by your physician.
The jaa states theat you should niot have decreased night vision, and .75 difference from day to night. If in the UK they are giving you a hard time, then ask them why? If your eyes are ok, then they should allow you to fly.
JAA regulations exist for the safety of all of us, however some doctors are a bit overzealus about complying to the rules.
Faa for example 20/20 corrected. You can have large prescription glasses and be a pilot. Europe is just somewhat behind in some matters....
Best of luck donīt give up.
(sorry about long post)