Liang points out that the mechanism of human vision is not limited to what you can see with the eye. Seeing with the eyes is one of the six low-level senses (sight, hearing, smell, taste, touch and brain consciousness). This is the realm of modern medical science.
梁乃崇指出，人類「看」的機制絕不只侷限在肉眼，用「眼睛」這個視覺器官看東西時，是在「六入」（即眼耳鼻舌身意六種器官）這個低層次中的一種作用，這也是現代醫學處理的範圍。