Left eye optic nerve damaged

 Hi, I'm new to this forum.

I don't have vision in my left eye, I'm having this from past 20 years, at present i'm 32 years old. When i consulted doctor, he said the optic nerve were damaged, the blood is not passing thru those nerves, thats why vision is not there. I'm having blurred vision in my left eye. 

I have good eye sight in my Right eye. I want to know, is there any treatment for this or any surgeries be performed to get vision in my left eye ??

- Thanks, 

Hyderabadi