My mom had her second (left) eye operated on for her cataracts on Thursday and this time it didn't go so well. By Saturday her vision was going black and when we called the emergency hotline they wanted us down in Oil Drill City immediately. Upon examination it was confirmed that her retina has detached and she immediately needed more surgery. That went fairly well although it's extremely painful and now she must lie on her side with her head at a 75 degree angle for 3 days and it may take as long as 3 month for full recovery. She's in a lot of pain and she's also very nauseous - it makes me wonder how eye sight relates to balance as it almost seems as if she's got motion sickness.
Speaking of balance. I highly recommend the book "Balance: In Search of the Lost Sense" by Scott McCredie. I'm in the middle of reading it (if I had finished it I would know the answer to the eyesight question). Scott was one of the authors we had who came to sign and speak about his book. It's non-fiction and it is really well written not to mention fascinating because balance is really something with so many unknowns still.