Not sure, but the whole point of Geordi's character was to encourage disabled viewers that the future would be a world in which more options would be available to them.... or perhaps that they could overcome obstacles in their lives, in the present.
Having Geordi's eyes magically 'fixed' forever would ruin that. The fact that Geordi was able to see but in shapes and colors very much unlike usual eyesight was a compromise that he had chosen to live with... as well as the pain associated with wearing the VISOR.
Of course, Burton has attractive eyes. We can enjoy them in Reading Rainbow