Suggest Treatment For Defect In The Left Eye

My sister had surgery on her left eye Thursday and it was to avoid her from becoming blind. After the surgery the doctors informed my mom that the surgery went fine. When my sister woke up later on she wasn't able to see from her left eye and the doctors said she should have been able to see. Still today my sister cannot see from her left eye. We are trying to find out will her eyesight come back and is it taking a lil bit more time. We believe the doctor gave us wrong information because when he completed the discharge paper it said blind in left eye, but he told us that the surgery went well. The surgery didnt go well becuase before my sister had the surgery she was ableto see from both of her eyes, after the surgery she can only see fom her right eye.