Oliver Sacks did end up with vision in only one eye and in his book (http://www.oliversacks.com/books/the-minds-eye/) he describes this experience and its effect on him. How any one individual would experience vision with only one eye, would vary depending on the age at which that vision was lost, and how the brain adapted to monocular vision.
I mention this as there seems to be a question on my dashboard, though it has not appeared elsewhere in the blog. If you are interested, do visit Oliver Sack’s website and The Mind’s Eye is a great read.
Green Writing Room 
I am now rapidly reaching that stage of monocular vision. However, am getting an operation to remove a macular membrane at the back of the crook eye on the 30th of July. I met the Prof.surgeon who will do this operation. I noticed he has a steady hand!
I have read some of Sacks work.
Best of luck with your operation. I wonder if the ‘hand’ is now a computer guided instrument. You would find the Sacks book on brain/vision very sympathetic. He was a member of the Stereoscopic Society (New York) – I had no idea such a body existed, but there are people around the world passionately keen on the subject.
Thanks for this, Hilary. I have one eye which is almost blind due to an epi-retinal membrane (may be similar to what Gerard has). My good eye compensates mostly but I do occasionally have 3-D problems – especially when pouring from a bottle to a glass or parking the car (you are allowed to drive with only one eye).
I can only try to imagine what this must be like and can see it might result in tricky moments. At (boarding) school we used to play a ‘game’ – going for long walks blind-folded with two sighted friends. We wanted to try and experience Helen Keller’s world (I know she was deaf as well, but we had to start somewhere). It seems that people who have never had stereoscopic vision (5 – 10% for a mixture of reasons) adapt well to the world and have no idea that the majority have another version of reality. Sacks story of the women who gained stereoscopic vision after a lifetime without it is quite astonishing. On the other hand, losing 3-D when you have always had it appears to be remarkably difficult, but does vary from person to person.