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Object injury is the most perilous because it invites the invasion of Wind, Water, and Qi (vital energy). The scars appear in two colors, yellow or white, with equal severity regardless of depth. Treatment should first focus on tonifying Qi to replenish lost Blood; if the patient shows signs of mental fatigue, the Shen (Spirit) must be calmed. If the eye has ruptured and sunk inward, decoctions and pills should be avoided to prevent further harm.

This passage generally refers to severe external trauma to the eye caused by sudden blows from metal or wooden objects. Initially, there will inevitably be redness, swelling, pain, and astringency; one should urgently administer Jiu Jing San (Eye-Saving Powder) and Hei Shen San (Black Spirit Powder). Once symptoms subside slightly, scars may appear, either yellow or white. White scars indicate a slower progression, while yellow ones are rapid and dangerous. If a red nebula (corneal opacity) appears accompanied by headache, the condition will likely deteriorate.

Subsequently, apply Zi Ni Jin (Purple Mud Gold) and observe the efficacy. Dispense ophthalmic medications appropriate for the specific condition, and recovery can be assured. If injured by a fine, sharp object, the wound is shallow and small, making it treatable. However, if the injury is large and deep, damaging the internal Shen Gao (Vitreous Humor) and breaking the external Shen Zhu (Eyeball), even urgent treatment can only avoid eyeball atrophy and protrusion, but blindness is ultimately inevitable. Alas! Children of wealthy families do not sit under eaves, and those who understand destiny do not stand beneath precarious walls. Is it not written in the books? Injury to the true eye (eyeball) by an object is not caused by Metal, Wood, humans, or natural disasters, but by human action. My treating it would be acting against the Way of Heaven.

The Great Dao has no thorns, yet when the wind rises, dust and sand compete. Sand blinds the eyes, preventing movement, while tears mix with a misty blur. How can we summon the "Lord of Songzi" (a poetic name for tea) to wash away all this turmoil?

This likely refers to wind-blown sand, soil, or gossamer accidentally entering the eye, causing incessant tearing, pain, and astringency that makes opening difficult. Another type of venomous insect, named Jin Can (Golden Silkworm), spins webs between bamboo and trees. If touched and not removed immediately, the eye will swell. If the swelling does not subside at its peak, the Shen Zhu (Eyeball) may suffer internal cracking. In fact, these conditions are generally easy to treat: simply grind high-quality ink thickly, apply it into the eye with a new sheep-hair brush, keep the eye closed briefly, and then use the brush to wipe out the foreign body. If the object does not come out, grind human fingernails and mix them with Zhu Shu Chi (Palm Civet Teeth) and ink, then reapply. Nothing will fail to come out. Once removed, the pain vanishes instantly, and medication is unnecessary. Unfortunately, people do not know this method; instead, they rub and blow at the eye, causing Qi and Blood stagnation. As tears dry, the foreign body adheres to the upper eyelid, leading to major disaster, and sometimes incurable outcomes. Alas!

Zhu Shu, also known as Tu Tun, has blue-green fur, a fat body, and short legs, feeding on bamboo roots. Woodcutters often dig them up in bamboo mountains. It has four teeth each on the upper and lower jaws, measuring eight fen in length, harvested alive for preparation.

Shi Lingzi from Sichuan was catching grass insects by the stream to feed birds during the autumn harvest. Accidentally, he brushed something into his eye, causing immediate eyelid swelling. There were two local eye doctors in his village: one diagnosed it as Summer-Wind, the other as Insect Poisoning. They prescribed their respective powders and pills. After taking them, he sweated profusely, his eyelids swelled more, and his eye pain became unbearable. With no other option, he invited me. I knew internally that it was merely sand blinding the eye and that the foreign body had not been removed. I everted the eyelid and saw a grain-sized object surrounded by blood stasis. Upon scraping it off, it was indeed a grain of millet. The room erupted in laughter, and his illness vanished instantly. However, the millet grain had awns (bristles) that repel dust; once it penetrated the Qing Jing (black cornea/pupil), how could it cause stabbing pain and obstruction for three days, eventually forming a Qi Yi (corneal scar)? Alas! Medicine relies on intuition. This was an accidental disease, and treatment is a grave matter; the intentions of the two doctors were profound indeed.