You can get an operation to fix the ptosis, it raises your eyelids. I had a friend who had that done years ago and it was very successful.
Your optician might be able to give you prisms to sort out your double vision but it depends on whether you have it all the time or just intermittently. I think prisms are possibly difficult. But getting the ptosis sorted out might help on its own.
Find yourself a good optician and speak to them, they ought to know how to go about things. Sorry I can't say more than that.
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