首楞嚴義疏注經 1.200

1.200

以眼根色是不可見，故指浮根。聖凡既爾，在己必然。面與身中，心眼定處也。

Because the form of the eye faculty is invisible, he points to the superficial faculties. Since it is so for both the noble and the ordinary, it is certainly so for oneself. The face and the interior of the body are the definite locations of the mind and the eyes.