Can a person who is blind receive an aliyah?  The question, from a conceptual and analytic point of view, is how to understand the post-Talmudic practice of having one person (the one receiving the aliyah) making a brakha on the Torah, and having another person (the shaliach tzibbur) doing the actual reading from the scroll.  In Talmudic times, the person who would receive the aliyah would also read directly from the scroll, and thus it was obvious that a person who was blind could not read