oops my bad!
Sorry, I stand corrected.
I know the initial limit for astigmatism is 2.00 dioptres because it is in the JAR Class 1 Visual Standards document.
I don't have the renewal limits in writing, I got them from Gatwick AMD and yes you are quite right, I believe they said it was 3.00 dioptres not 5.00.
I remember them saying I'm just beyond renewal at -3.5. Perhaps if I was within the renewal limits they would have bent the rules?
I'm taking the plunge with LASIK soon, come what may.