Some people say: “don’t lose eye contact”, “don’t look at the opponent”, “watch him carefully”, “ignore him”. All is true and all is wrong.
My feeling is that within the yoroi kumiuchi sphere the only “living thing” is the eyes of the opponent. If you want to receive the flow of his intentions you have to connect to him through the eyes.
This is another way of understanding “kanjin kaname” which then could translate as: “through the eye I can see through his spirit”.