Can't follow you. How do you get double vision? Is there something wrong with your body? Yes, the whites of our eyes will turn yellow if there is something wrong with our liver. But what's the relationship between green bile and eyes? I don't know. You'd better consult an eye doctor immediately. Good luck!
You got it from a fast? I have never heard that a fast can lead to double vision. Maybe you are just so hungry so that you have a headache and double vision. You can eat more food to provide your body with enough energy. I suggest you to have a good rest. Then you won't feel dizzy anymore.
Eye exercises can't correct double vision or improve eyesight. You'd better see an eye doctor immediately. What caused your double vision? You said a fast. But I doubt it. Maybe the doctor can find out what causes your double vision and give your appropriate suggestions to treat with it. Don't believe in eye exercises. Good luck!