SD60M I have had numerous types of sorcery one my eyes.
First let me say I think you are living in a good time to have many types of eye issues resolved. However there are many that don't yet have solutions.
I have not had a retina reattached but know people who have and they have done well. The post surgery recovery may require you to have to have a lot of patients for a short period of time while maintaining your head in an unusual position,
I have had the membrane in front of the retina removed because it got a crinkled in it from swelling and stretching and tearing the membrane.
Without the surgery I would not have enough sight in that eye to enjoy my trains.
My vision in the other eye is 20/200 which means I can only see the BIG E on the eye chart.
When I type here on the OGR I make lots of mistakes but I keep trying to do my best. You will find that your mind will be a big plus for you. You will find that what ever loss of sight you may ever have the mind tries to over come it and you will find ways to over come most short comings.
It is very difficult for me to work with my hands because of the issue with depth perception. A simple thing like placing a car back on the track is not as easy as it once was but you will find ways most of the time.
DON' T GIVE IN and always keep trying even if its not perfect.
I look at it this way, I had good sight for 50+ years while some people never have had it or have had issues at a much earlier time in life.
Best of luck and running your trains will still be something you will be able to enjoy.
Best of Luck to you.and remember to ask GOD to help you through this period of life,
POPSRR