What is the cause of the diplopia??
I would suggest, rather than finding a cure for the symptom, cure the underlying problem. If the doctor has advised to wait as he expects it to get better, maybe it is wise to wait?
Or better still, get a second opinion from a doctor you can trust and see what he has to say about the cause and suggested management.
Generally speaking, it is *not* at all prudent to seek medical advice over the internet. Chances are the patient ends up in a big mess.