Wiktionary
sight-reader
n. A person who is able to sightread
Usage examples of "sight-reader".
He did not absolutely assert that he had borne a part in this particular quartet but he let it be understood that he was intimately familiar with it: and even if he had not been he was, as the skipper himself would testify, so practised a sight-reader that he did not need to study the score before sitting down to it, so long as he had a good light on his music-stand.