夫五轮为捍御之司，周防于外。八廓为转运之使，应接于内。廓取恢廓之意，经言使道
坠以
长，盖人身面部，自齿以后至会厌深三寸半，咽门至胃长一尺六寸，则脏腑之于目，相去甚
远。廓其输将精液之道路，犹之经涂九轨，以通往来也。干居西北，络通大肠之腑，脏属于
肺，肺与大肠为表里，上运清纯，下输糟粕，为传送之官，故曰传道廓。坎居正北，络通膀
胱之腑，脏属于肾，肾与膀胱为表里，乃真水之源，以输精液，故曰精液廓。艮位东北，络
通上焦与命门，上焦与命门会合诸阴，分输百脉，故曰会阴廓。震位正东，络通胆之府，脏
属于肝，肝与胆为表里，主运清纯，不受污浊，故曰清净廓。巽位东南，络通中焦与肝之络
，肝络通血，以滋养中焦，分气血以为化生，故曰养化廓。离居正南，络通小肠之府，脏属
于
心，心与小肠为表里，为诸阳受气之胞，故曰抱阳廓。坤位西南，络通胃之府，脏属于脾，
脾与胃为表里，主纳水谷以养生，故曰水谷廓。兑位正西，络通下焦与肾之络，肾络与下焦
主持阴精，养化生之源，故曰关泉廓。夫脏腑之相配，内经已有定法，至三焦之分发肝肾者
，此目之脉络配法也。盖目窍于肝，主于肾，故有二络之分发。察乎二目经络之间，昭然可
见矣。
The Five Wheels (Wulun, the five anatomical zones of the eye corresponding to the Zang-Fu organs) serve as the defensive barriers, providing comprehensive protection on the exterior. The Eight Palaces (Baku, eight regions of the eye associated with specific physiological functions and organ systems) act as the transporters, managing internal reception and transmission. "Palace" (Kuo) implies vastness and openness. The *Ling Shu* (Spiritual Pivot) states: "The pathways are deep and long," indicating that the facial channels are profound. From behind the teeth to the epiglottis is three cun and a half deep; from the pharyngeal gate to the stomach is one chi and six cun long. This indicates that the distance between the Zang-Fu organs and the eyes is considerable. The Palaces function as the conduits for transporting essence and fluids, akin to wide thoroughfares capable of accommodating nine chariot tracks, ensuring smooth circulation and communication.
Qian Palace is located in the northwest, its meridians connecting to the Large Intestine Fu organ, while its internal Zang association belongs to the Lung. The Lung and Large Intestine are interior-exteriorly paired; the upper Jiao transports pure qi, and the lower Jiao conveys waste products. As the official of transmission, it is therefore called the Chuan Dao Palace (Palace of Transmission).
Kan Palace is located due north, its meridians connecting to the Bladder Fu organ, while its internal Zang association belongs to the Kidney. The Kidney and Bladder are interior-exteriorly paired; it is the source of True Water, responsible for distributing essence and fluids, hence it is called the Jing Ye Palace (Palace of Essence and Fluids).
Gen Palace is located in the northeast, its meridians connecting to the Upper Jiao and the Ming Men (Gate of Life). The Upper Jiao and Ming Men converge the Qi of all Yin meridians and distribute it to the hundred vessels, thus it is called the Hui Yin Palace (Palace of Converging Yin).
Zhen Palace is located due east, its meridians connecting to the Gallbladder Fu organ, while its internal Zang association belongs to the Liver. The Liver and Gallbladder are interior-exteriorly paired; it governs the metabolism of pure qi and remains free from turbidity, so it is called the Qing Jing Palace (Palace of Purity and Clarity).
Xun Palace is located in the southeast, its meridians connecting to the Middle Jiao and the collateral vessels of the Liver. The Liver collaterals circulate blood to nourish the Middle Jiao, differentiating Qi and Blood to facilitate transformation and generation, thus it is called the Yang Hua Palace (Palace of Nourishment and Transformation).
Li Palace is located due south, its meridians connecting to the Small Intestine Fu organ, while its internal Zang association belongs to the Heart. The Heart and Small Intestine are interior-exteriorly paired; it is the vessel where all Yang meridians receive Qi, hence it is called the Bao Yang Palace (Palace of Embracing Yang).
Kun Palace is located in the southwest, its meridians connecting to the Stomach Fu organ, while its internal Zang association belongs to the Spleen. The Spleen and Stomach are interior-exteriorly paired; they govern the reception of water and grains to sustain life, thus it is called the Shui Gu Palace (Palace of Water and Grains).
Dui Palace is located due west, its meridians connecting to the Lower Jiao and the collateral vessels of the Kidney. The Kidney collaterals and the Lower Jiao jointly govern Yin essence and nurture the source of transformation and generation, hence it is called the Guan Quan Palace (Palace of Closing the Spring).
The pairing of Zang and Fu organs follows established principles in the *Nei Jing* (Inner Canon). Regarding the distribution of the San Jiao (Triple Burner) linking to the Liver and Kidney, this refers to the specific meridian configuration of the eye. Since the eye orifices connect to the Liver and are governed by the Kidney, there are two distinct collateral distributions. By observing the meridian networks of both eyes, these patterns become clearly visible.