Does rhinoplasty affects eye muscles and nerves?

I had an eye injury long time ago, and my eye muscle is trapped by the delicate bones that separate the orbit from the ethmoid sinus. I have small eye movement restriction. Also, does general anesthesia increase risk of brain stroke? Three years ago, I had some light symptoms similar to stroke, but nothing since then I am feeling fine now. Is there a big risk if I go on operation? I must mention that I am almost 30 years old.