text: Old school martial arts tend to say look at the eyes but as a mixed martial artist I would always say watch the chest/shoulder area as they tend to give movement away. My old Karate instructor (even after I left Karate) was positive that the eyes were the key until he & I gave Krav-Mega a go and he was suddenly converted as by watching the eyes with a faster martial art he kept missing the punches to his head etc :)