Ahaa, ok. Helps a lot :).<br/><br/>Anyways yeah, it's fan made article but then again red eyes are non-cannon bloodline so it lacks in information regarding how it actually bio-mechanically actually works/manifests. It kind of makes sense that Mibu clan members develop some strong physique and having well developed chakra lines even when they do not manifest red eys.<br/><br/>But those who do achieve certain degree of body finesse then manifest red eyes. But to manifest true red eyes asks somesort rare genetic mutation which occurs in otherwise perfect body (chakra channels wise).