That is true Dried, but I'm convinced it's actually an error in the books. Just like Traveling is described completely differently, twice, in EotW than how it is in the rest of the series, this is the only mention of Wise Ones having the ageless look. They may have kept it in because there's a chance he's referring to someone still looking young while having the eyes of someone much older and knowledgeable ... which would also explain it.