Different countries in Europe have different requirements for a JAR medical. Looking at your location, I think you're interested in UK CAA/JAR Class 1 medical. These are the vision requirements for an initial issuance:
http://www.caa.co.uk/docs/49/SRG_MED...InitialVisStds[2189].pdf
They say that your refractive correction should not exceed +5.00 dioptres. That's the part after SPH in your prescription. Which means that your left eye will be problematic. I don't know if CAA has any procedure for allowing a special issuance or some kind of waiver when you don't meet the initial criteria.
LASIK - look further down on the same page. The CAA does not recommend it and they still require you to have less than +5 diopter before the operation.
The requirements for the Class 2 medical seem to be simlar, less then +5 -
http://www.caa.co.uk/docs/49/SRG_MED...InitialVisStds[538].pdf plus from what I know that's good only for private flying.
Your best bet is to look what the document above says and contant the CAA Medical Department for advice.