The capacity to see and hear clearly is an attainable goal for those seeking healing. And equally attainable is the preservation of clear sight and sharp hearing. But the attainment of such goals is entirely free of any facet of spiritualism.
Unless our efforts are based on scientific prayer, however, real healing is not accomplished. If we are merely trying to increase the capacity of a pair of ears to hear or a set of eyes to see, we aren't dealing scientifically with the discord. We will be limited to how far mortal mind stretches its beliefs. An expansion of mortal belief one day leaves us with no guarantee it won't contract the next. Belief is never fixed. In the light of Truth we see that it constantly fluctuates.
Matter neither sees nor hears. Mortal mind—a supposed mind independent of God—assigns sight and hearing to matter. Mortals accept this assignment, just as a child might assume the voice originates in a ventriloquist's dummy. Regardless of how certain we may be that material organs see matter or hear sound, the fact is that real seeing and hearing are entirely spiritual. They originate in Spirit, Soul, and are the specific spiritual senses of man. Neither life nor sensation really belongs to matter; the appearance that they do is only the objectification of mortal belief. We all can exercise spiritual sense but not merely as mortals. This pure sense is exercised to the extent we put off mortality.