夫两眼角红丝穿入白珠如线者，乃心火克肺金
也。当用柴胡、黄连、菊花以泻心火，肺金自得其平。
白珠红赤灌入黑睛，乃肺金克肝木也。当用桑白
皮、枳壳、黄芩以泻肺火，肝木自得其平。
黑珠凸出胀痛，两胞红肿难开，乃肝木克脾土
也。当用赤芍、胆草、生地、麦冬以泻肝火，脾土自
得其平。
两胞肿，黑珠下陷难开，是脾土克肾水也。当用
栀子、石膏以泻脾土，肾水自得其平。
三症俱先点白玉锭，次点元灵丹，有云点至宝丹
（方见三卷）。
五轮者、金、木、水、火、土也。相生则无病，
相克则有病。
何谓相生？如肺属金为气轮，肾属水为水轮，肝
属木为风轮，心属火为血轮，脾属土为肉轮。金生水。
水生木，木生火，火生土，土生金，金复生水，生生
不绝，何病之有？
何谓相克？若五脏不平，郁发心火，克于肺金，
肺金克肝木，肝木克脾土，脾土克肾水，肾水克心火，
心火复克肺金，克克不已，万病生焉。
治法须明生克之理，自然药到成功。故五轮、八
廓，各属一经，治疾先详根源，然后对症加减。
五轮分部云∶白睛属肺。凡白睛生红丝，皆因心
火克肺，肺经积热无处消散，随肺之经络上入于目，
遂生红丝，盘结于白睛。延及二载，即长白脂皮一层，
将红丝瞒着；脂皮外又长红丝一层，如此数层，其
病成矣。
初见红丝时，宜利小便，令心火由小便而出，心
与小肠为表里也。邪火既去，肺不受侵矣。若病止在
肺经，未入于肝经，间用寒凉药亦无妨，以乌睛尚
未生云翳也；点扫雾舟、至宝舟，用《秘诀》吹冲法。
凡是两眼内眼角出现红丝像线一样穿入白珠（眼白）的，这是心火克制肺金的表现。应当使用柴胡、黄连、菊花来清泻心火，肺金自然就能恢复平衡。
如果白珠红赤并侵入黑珠（黑眼），这是肺金克制肝木的表现。应当使用桑白皮、枳壳、黄芩来清泻肺火，肝木自然就能恢复平衡。
如果黑珠凸起胀痛，上下眼睑红肿难以睁开，这是肝木克制脾土的表现。应当使用赤芍、龙胆草、生地黄、麦冬来清泻肝火，脾土自然就能恢复平衡。
如果上下眼睑肿胀，黑珠下陷且难以睁开，这是脾土克制肾水的表现。应当使用栀子、石膏来清泻脾土之热，肾水自然就能恢复平衡。
以上三种症状，都应当先点用白玉锭，其次点用元灵丹，也有说法称点用至宝丹（方剂见第三卷）。
五轮（指眼部的五个部位及其对应脏腑的理论）分别对应金、木、水、火、土五行。相生则无病，相克则致病。
什么是相生？例如肺属金，称为气轮；肾属水，称为水轮；肝属木，称为风轮；心属火，称为血轮；脾属土，称为肉轮。金生水，水生木，木生火，火生土，土生金，金又复生水，生生不息，怎么会生病呢？
什么是相克？如果五脏功能不平衡，郁结化发为心火，克制肺金；肺金再克制肝木；肝木再克制脾土；脾土再克制肾水；肾水再克制心火；心火又复克制肺金，这种克制循环不已，各种疾病就会由此产生。
治疗方法必须明白生克的原理，自然能药到病除。所以五轮和八廓（眼部的八个区域及其对应脏腑的理论），各自归属于一条经络，治疗疾病首先要详细探究根源，然后针对症状进行药物的加减。
关于五轮的分布部位说：白睛（眼白）属于肺。凡是白睛生出红丝，都是因为心火克制肺金，导致肺经积热无处消散，随着肺的经络上行进入眼睛，于是产生红丝，盘结在白睛上。拖延两年，就会长出一层白色的脂膜，遮盖住红丝；脂膜外面又长出一层红丝，如此层层叠加，病症就形成了。
初现红丝时，适宜通利小便，使心火从小便排出，因为心与小肠互为表里。邪火既然去除，肺就不受侵犯了。如果病仅停留在肺经，未传入肝经，间歇性使用寒凉药物也无妨，因为黑珠尚未生成云翳（角膜混浊）；可点用扫雾舟、至宝舟，并使用《秘诀》中的吹冲法。
When red filaments resembling threads penetrate the Bai Zhu (White of the Eye, sclera) from the inner canthi of both eyes, it indicates that Heart Fire is overcoming Lung Metal. One should use Chai Hu (Bupleuri Radix), Huang Lian (Coptidis Rhizoma), and Ju Hua (Chrysanthemi Flos) to drain Heart Fire, so that Lung Metal naturally regains its balance.
If the Bai Zhu becomes red and congested, invading the Hei Jing (Black Pupil, cornea), it indicates that Lung Metal is overcoming Liver Wood. One should use Sang Bai Pi (Mori Cortex), Zhi Ke (Aurantii Fructus), and Huang Qin (Scutellariae Radix) to drain Lung Fire, so that Liver Wood naturally regains its balance.
If the Hei Jing protrudes with distending pain, and the upper and lower eyelids are swollen and red, making them difficult to open, it indicates that Liver Wood is overcoming Spleen Earth. One should use Chi Shao (Paeoniae Radix Rubra), Dan Cao (Gentianae Radix), Sheng Di (Rehmanniae Radix), and Mai Dong (Ophiopogonis Tuber) to drain Liver Fire, so that Spleen Earth naturally regains its balance.
If the upper and lower eyelids are swollen, and the Hei Jing sinks inward, making it difficult to open, it indicates that Spleen Earth is overcoming Kidney Water. One should use Zhi Zi (Gardeniae Fructus) and Shi Gao (Gypsum Fibrosum) to drain Spleen Earth heat, so that Kidney Water naturally regains its balance.
For all three conditions, one should first apply Bai Yu Ding (White Jade Pellet), followed by Yuan Ling Dan (Primordial Spirit Pill). Some say to apply Zhi Bao Dan (Precious Treasure Pill) (formula seen in Volume 3).
The Wu Lun (Five Wheels) correspond to Metal, Wood, Water, Fire, and Earth. Mutual generation implies no disease; mutual overcoming implies disease.
What is meant by mutual generation? For instance, the Lung belongs to Metal and is called the Qi Wheel; the Kidney belongs to Water and is called the Water Wheel; the Liver belongs to Wood and is called the Wind Wheel; the Heart belongs to Fire and is called the Blood Wheel; the Spleen belongs to Earth and is called the Flesh Wheel. Metal generates Water; Water generates Wood; Wood generates Fire; Fire generates Earth; Earth generates Metal; Metal again generates Water. This cycle continues endlessly, so how could disease arise?
What is meant by mutual overcoming? If the Five Viscera are imbalanced, stagnation transforms into Heart Fire, which overcomes Lung Metal; Lung Metal then overcomes Liver Wood; Liver Wood overcomes Spleen Earth; Spleen Earth overcomes Kidney Water; Kidney Water overcomes Heart Fire; and Heart Fire again overcomes Lung Metal. If this cycle of overcoming continues without end, myriad diseases will arise.
Treatment methods must clarify the principles of generation and overcoming; thus, the medicine will naturally succeed. Therefore, the Wu Lun (Five Wheels) and Ba Kuo (Eight Passes) each belong to a specific meridian. When treating disease, one must first detail the root cause, and then modify prescriptions according to symptoms.
Regarding the distribution of the Wu Lun: The Bai Jing (White of the Eye) belongs to the Lung. Whenever red filaments appear on the Bai Jing, it is because Heart Fire overcomes Lung Metal, causing accumulated heat in the Lung Meridian to have nowhere to dissipate. Following the Lung's meridians, it ascends into the eyes, resulting in red filaments that knot upon the Bai Jing. After two years, a layer of white fatty membrane grows, covering the red filaments; outside this membrane, another layer of red filaments grows. Such layering leads to established disease.
When red filaments first appear, it is appropriate to promote urination, allowing Heart Fire to exit via the urine, as the Heart and Small Intestine are exterior-interior partners. Once the pathogenic fire is removed, the Lung will not be invaded. If the disease remains confined to the Lung Meridian and has not entered the Liver Meridian, intermittent use of cold-cooling herbs is permissible, since the Hei Jing (cornea) has not yet developed Yun Yi (cloudy opacity); one may apply Sao Wu Zhou and Zhi Bao Zhou, using the "Blowing and Rushing Method" from the *Mi Jue* (Secret Manual).