《黄帝内经·素问·风论》
风邪由足阳明胃经入胃，循经脉上行到目内眦，假如病人身体肥胖，腠理致密，则风邪不能向外发泄，稽留体内郁而化热，形成 热中 ，症见目珠发黄。假如病人身体瘦弱，腠理疏松，则阳气外泄而感到畏寒，形成 寒中 ，症见眼泪自出。
风气与阳明入胃，循脉而上至目内眦，其人肥，则风气不得外泄，则为热中而目黄；人瘦，则外泄而寒，则为寒中而泣出。
Wind evil enters the stomach from the foot Yangming stomach meridian, goes up along the meridian to the inner corner of the eye. If the patient is obese and the skin is thick, the wind evil cannot be released to the outside, and it accumulates heat in the body, forming internal heat, and the eyes turn yellow. If the patient is thin and the pores are loose, the yang qi will leak out and he will feel cold, forming internal cold, and tears will come out automatically.