I understand why this is on HN (eyes are cool and one of the best-known complex biological computational systems, though we've got a ways to go), but I'm at a bit of a loss as to why this is news to the Telegraph. I was taught this twelve years ago in Psych 101. Literally, PSY101 at Michigan State, I'm not just using 101 as a metavariable meaning "low level course". What's my point? Whatever root study this was extracted from probably says something even more interesting, or at least more novel, and the reporter must have gotten side tracked by the introductory material.