Hi wayne,
sorry to hear about your problem. I have exactly the same condition as you, where one eye is 6/4 and the other is myopic to -2.5D. The UK initial only allows you 2D of difference in prescription between your eyes, so if my good eye was worse, I would pass ! Sick eh ? Anyway, I was denied a Class 1 last year, but found out that if you hold a foreign CPL or higher licence when you apply for a JAA Class 1 the examination is to "extended renewal" standards, which for the case of a lazy eye, means you can have up to 3D of difference. I would advise that you find out what the difference in prescription is between your eyes - this may be a possibility. NB : as far as I know, the UK is the only JAR country to offer this loophole, so you may have to travel to gatwick. You should check out the CAA website as well.
I will be returning to gatwick with my shiny canadian CPL before the end of the year, so I can let you know how it goes.
Best of luck
divorcingjack