Someone should do a large-scale study of peoples' experiences of qualia for each sense. Much like Galton's experiments with mental imagery, people could have wildly different experiences that we previously weren't aware of. I'm not aware of any such studies, though, or studies that look into the relationship between sensory deficits and heightened experiences. Heightened sensitivity, sure, but not quality of experience. Philosophers don't seem to do many psychology experiments.
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