I feel your pain
As someone who was about your current prescription, theres not a great deal one can do currently....however having had LASIK and now sitting at a stable -0.75D 3years on, I reckon one may be able to play yet.
For Class2, I'd have a medical with the doc, and provide my current prescription (which would be -0.75D), assuming the Optician in the highstreet didn't spot the LASIK (unlikely). And there's a class2 medical.
For class1 I don't know, the CAA at Gatwick I have no doubt would spot the LASIK (who knows though?). Maybe having a -0.75D prescription 3years later, no side affects and otherwise excellent health may count?
Either way, rightly or wrongly, I don't forsee any problems with getting a Class2 medical, Class1 however may well be a slightly trickier affair!