The *Zhu Bing Yuan Hou Lun* (Treatise on the Pathogenesis and Symptoms of All Diseases) states: The eyes are the convergence point for the yin and yang essence and qi of the five zang organs and six fu organs. If invaded by wind pathogenic factors, it will cause dimness and unclear vision.

The *Yang Sheng Fang* (Prescriptions for Health Preservation) states: Indulgence in pleasure damages the Hun (Ethereal Soul), which connects to the eyes. Damage to the Liver results in dim vision.

The *Jin Shao Fu Shi Lun* (Discussion on Taking Minerals by Jin Shao) states: When washing hair, do not allow sebum residue liquid to enter the eyes, as this causes eye pain.

The *Yang Sheng Yao Ji* (Essential Collection for Health Preservation) states: Washing the eyes with cold water draws internal heat upward, causing premature blindness.

The *Zhi Yan Fang* (Prescriptions for Treating Eyes) states: There are seven types of eye diseases. First, damage from sexual intercourse leading to deficiency and exhaustion of essence; second, damage from strong winds; third, damage from extreme cold; fourth, damage from extreme heat; fifth, formation of nebulae (corneal opacities), sometimes accompanied by severe pain, or simply darkness and inability to see. The treatment prescription is as follows:

Cassiae Semen (Jue Ming Zi) (4 fen)
Plantaginis Semen (Che Qian Zi) (6 fen)
Atractylodis Rhizoma Albae (Bai Zhu) (6 fen)
Kochiae Scopariae Herba (Di Fu Zi) (6 fen)
Asari Radix et Rhizoma (Xi Xin) (4 fen)
Platycarpi Semen (Bai Zi Ren) (6 fen)

These eight substances are ground and sifted. Take one fang cun bi (a square-inch measure) per dose, three times a day. After one hundred days, eye diseases are eliminated, and distant vision becomes clear.

It also states: To treat loss of eye essence (vision loss) lasting one to two years or even three to four years, where there are no other abnormalities in the eyes but only an inability to see, as if viewing through silk gauze. Jue Ming San (Cassiae Powder):

Cassiae Semen (Ma Ti Jue Ming) (2 dou)

This single substance is crushed, ground fine, and sifted. Take one fang cun bi with the clear liquid of rice porridge, three times a day. Raw fish, pork, and pungent vegetables are prohibited.

The *Ge Shi Fang* (Ge's Prescriptions) for treating thirty-year blindness where one cannot recognize people: Zhong Ru Yun Mu San (Stalactite and Mica Powder):

Concretio Silicea (Zhong Ru) (4 fen)
Poria (Fu Ling) (4 fen)
Polygalae Radix (Yuan Zhi) (4 fen)
Asari Radix et Rhizoma (Xi Xin) (4 fen)
Mica (Yun Mu) (4 fen)

These five substances are crushed, ground fine, and sifted into a powder. Take half a qian bi, gradually increasing to one qian bi.

It also states: A prescription for unclear vision:

Cassiae Semen (Jue Ming Zi) (1 fen)
Pruni Armeniacae Semen Amara (Rui He Ren) (1 fen)
Coptidis Rhizoma (Huang Lian) (2 fen)
Fraxini Cortex (Qin Pi) (2 fen)

These four substances are cut, boiled in eight he of water until reduced to three he. Soak cotton in the decoction and wash the eyes.

Another prescription: Use the comb blood of a three-year-old rooster, applying it frequently until natural recovery.

The *Da Tang Yan Nian Fang* (Great Tang Longevity Prescriptions) for treating blank vision (unable to see): Jing Jie San (Brassicae Napus Seed Powder):

Brassicae Napus Seed (Jing Jie Zi) (Xiao Er sheng, boiled in one da dou of water until dry, juice extracted, sun-dried, and roasted into powder)
Sesami Fructus Preparatus (Lian Hu Ma) (Xiao San sheng, roasted into powder)

These two substances are mixed and ground. Take with vinegar.

The *Duan Ju Fang* (Short Drama Prescriptions) for sudden blindness:

Chop Catalpa wood, boil, and use the water to wash the eyes, three times a day. (Same as *Ge Shi Fang*.)

The *Qian Jin Fang* (Thousand Gold Prescriptions) Shen Qu Wan (Saccharomyces Pill) primarily for brightening eyes, allowing reading small print even at one hundred years old:

Saccharomyces (Shen Qu) (4 liang)
Magnetitum (Ci Shi) (2 liang)
Mercurii Sulfidi Rubrum (Guang Ming Sha) (1 liang)

These three substances are taken with warm water, three pills the size of wutong seeds, with no contraindications. Regular use benefits eye strength. Other prescriptions cannot compare; scholars should know this prescription is miraculous and ineffable.

Another prescription: Three sheng of Brassicae Napus Seed, thoroughly washed, boiled in three sheng of sour wine until cooked, dried, ground fine, and sifted. Take one fang cun bi with well water, daily... [Text cuts off here].

Another prescription: On the third day of the third lunar month, collect Brassicae Napus flowers, shade-dry, grind into powder. Take one fang cun bi with well water on an empty stomach. Long-term use promotes longevity and clear vision, enabling night writing.

Another prescription: One sheng of Sesame, steamed thirty times, ground into powder. Take one sheng with wine daily.

It also states: For treating blank, unclear vision like that of an elderly person: Take one carp gallbladder, extract the juice, soak cotton in it, and wipe the eyes.

It also states: Moxibustion for dim vision: Moxa points below Dazhui (GV14), repeatedly selecting the tenth vertebral segment. Precisely in the center of the spine, apply two hundred moxa cones; more is better. It is very effective; no other prescription is needed.

The *Lu Yan Fang* (Verified Prescriptions) Huang Lian Tai Yi Wan (Coptis Great One Pill) for treating liver heat rushing to the eyes causing blurred vision:

Coptidis Rhizoma (Huang Lian) (2 jin)

This single substance is soaked in one sheng of good clear wine overnight, removed, dried, and returned to the wine. Repeat this ten times until the wine is exhausted. Dry, crush, and sift. Mix with honey to form pills the size of wutong seeds. Take seven pills per dose, twice a day. Contraindications: Pork, fish, dog, horse, chicken meat, five pungent spices, and raw/cold foods. Follow other medication rules accordingly.

Su Jing's Commentary on Materia Medica states: Crush and squeeze Kochiae Scopariae Herba juice to wash the eyes. (Current note: *Lu Yan Fang* records: Crush, sift, take with wine, one fang cun bi, three times a day.)

The *Fan Wang Fang* (Fan Wang's Prescriptions) for treating dim, blank vision:

Pruni Armeniacae Semen Amara (Rui He) (3 fen)
Coptidis Rhizoma (Huang Lian) (2 fen)
Zingiberis Rhizoma Preparatum (Gan Jiang)
Asari Radix et Rhizoma (Xi Xin) (1 fen each)

These four substances are chopped. Soak in three he of honey and three he of water overnight. Boil to obtain two he. Apply drop by drop into the eyes, three to four times a day.

The *Ji Yan Fang* (Collected Verified Prescriptions) for unclear vision with painful tearing:

Use Gallus gallus domesticus niger Gallbladder (Wu Ji Dan), apply before sleep. Effective.

Another prescription: Extract juice from Rumex acetosella stems and drip into the four canthi, repeating frequently.

The *Seng Shen Fang* (Monk Shen's Prescriptions) for ten-year blindness unresponsive to hundreds of doctors: Yu Jin San (Curcuma Powder):

Curcumae Radix (Yu Jin) (2 liang)
Coptidis Rhizoma (Huang Lian) (2 liang)
Alumen (Fan Shi) (2 liang)

These three substances are ground and sifted. At bedtime, place into the eyes the size of millet seeds, once a day.