NEED ADVICE ON-POST HERNIA SURGERY PROBLEMS !

My oldest sister had hernia surgery on May 9th of this year for a very large hernia that had strangulated parts of both intestines! They had to remove parts of each! It all started with her having to go to the hospital for severe dehydration! They found this hernia during the exam, they kept her and did the surgery the following morning! Since the surgery, she has very blurred vision and is very weak! She is wondering if either of these will go away or are they going to be a life long problem. She has problems with anxiety and panic attacks so you can imagine what she's going through with not being able to see well! I need advice and information from anyone on here that has had hernia surgery, knows of someone who has had hernia surgery or that could tell me about some good informational websites that would explain some of what she's feeling! Her doctor has recommended a liquid vitamin called ENIVA, he told her she could get it online but she doesn't have access to the internet. I'm going to look that up for her but if you know anything about it please let me know...thank you in advance! Love & Prayers, Deb M