Can I get an EASA Class 1 medical with high astigmatism?
There isn't an equivalent of FAA SODA under EASA regulations.
The final decision is up to the ophtalmologist (in agreement with the AME). You should bring to the medical examinations all supporting material to help him take an informed decision.
In case you won't pass the medical examination, you will be given right to appleal. For the appealing procedure you will have to prepare a dossier to persuade that you are fit for the EASA Class 1 medical.
Good luck!