You say you 'had' one? Does that mean you don't now? I ask that because that happened to me about 2006 or 2007. I was referred to a retinal specialist after my optometrist couldn't find anything after I complained of a "floater" in my right eye.
The retinal specialist found out that the retina in my right eye had indeed detached at some point and then reattached by itself. This NEVER happens. Because of my age the edge of the retina was lacy and there was a chance of it happening again. There are two methods of spot-welding, if you will, the retina as a preventative measure. One is a frozen probe that is placed on the back of the eye and the other is a laser to zap it and cauterize it place.
The later was performed in the next office while I was there. I was zapped through the front of my eye about 50 times - not much pain just very uncomfortable. Recovery was quick and I was back living my life within a week or so.
I have not had any issues since then. I still shoot my bow most days, still shoot sporting clays and still hunt with a shotgun on occasion. According to my Doc, my retinal detachment was not due to any particular activity and I could proceed with my life as before.
The one caveat is that if I ever see many flashes of light in my eye it's an emergency as that is a sign of retinal detachment. I get one now and then but only onesy twosy at a time.
I hope your procedure is as easy as mine was. Retinal detachment is nothing to fool with and needs expert intervention to prevent further degredation in eyesight.
Good luck,