Ayjay I had a detached retina so had no real choice, it was an emergency operation to stop me losing my sight in that eye.
That involved having an air bubble inside my eye to hold the retina in place and I had the black circle like grandma.
The experience has made me so appreciative of my vision and I would do anything to avoid losing it.
If you are unsure, the questions I would ask the consultant are
1. If you don't have it done, will your eyesight deteriorate and if so, how rapidly.
2. If your condition deteriorated further, would that make surgery more difficult or impossible, ie, is there a point of no return.
Personally I wouldn't hesitate to take the advice of the consultant. I had a general anaesthetic for the surgery and the post op period, although tedious because I had to sit still for 10 days while things healed, was completely painless.
Good luck.