首楞嚴義疏注經 1.325

1.325

又若汝心能見面者，本分身處應無知覺，以在眼根處虛空故。身若有覺，眼必無知。在一不在一，經文巧略故不言也。

Furthermore, if your mind were able to see your face, your bodily frame should have no awareness, because [the mind] would reside in the eye faculty in empty space. If the body has awareness, the eye must have no knowledge. Being in one means not being in the other; the sūtra text skillfully omits this and therefore does not say so.