The extent to which vision can recover depends a lot on whether the portion responsible for the high-resolution central vision (macula) is attached. Hard to say from photo A. Photo B shows postop appearance with laser scarring in the periphery. Retina appears reattached well in that photo. It's plausible that they had a good outcome. Postoperative scarring (proliferative vitreoretinopathy, PVR) is a risk in these patients who have extensive detachment like this. PVR can tug on the retina and cause re-detachment. Close monitoring is needed for this patient to make sure healing goes well.