Double vision is a curable disease.
First of all, try to find what are the causes of your double vision you are suffering from.Go to see a doctor, tell him your symptoms and figure out the causes with him/her. Only when you know the symptoms and the causes can you find the solution.
There are several possible causes of double vision including astigmatism, cataract, dry eyes syndrome, and eye muscle damage.
Here are the treatments.
a.Astigmatism- you need a pair of corrective lenses, glasses or contact lenses.
b.Cataracts -you need a surgery to have the cataracts removed.
c.Dry eyes syndrome-you can drip some eye drops.
d. Eye muscles damage- you should have surgery or injection on the ill eye.
B.An alternative compensation-Wear an eye patch on the ill eye