The Last Supper

I'm really fascinated by the study on the meal sizes in paintings of the Last Supper (http://news.bbc.co.uk/1/hi/health/8580146.stm) They used head size as a yardstick. This made me think about the distance between people's eyes, fairly standard at about 6.5 cm, and I wondered if anyone had done a study comparing the distance between Judas's eyes and those of the other disciples?