According to research impaired structural brain development due to visual deprivation from birth is not fully reversible and limits functional recovery. So even

According to research impaired structural brain development due to visual deprivation from birth is not fully reversible and limits functional recovery. So even if eye sight is fully restored, cortical function will not be able to fully take advantage of that. Experiments and studies have shown that this might be due to the fact that the visual cortex will take over a similar role in blind people as it does for people with intact eye sight. The brain uses different sensory inputs in that case and the visual brain structure is not restored after eye sight recovery. This is still an ongoing field of research of course, but so far congenital blindless seems to be incurable, regardless of whether the sensory apparatus could be restored or replaced. Note that this only means seeing like a non-blind person. Some limited visual perception is still possible, just not "normal" sight.