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Among those who comprehend the Great Origin (Taiyuan, the fundamental principle of the universe), none surpasses medicine; and among medical disciplines, ophthalmology is particularly held to the standard of "Shiquan" (Perfection/Complete Cure). This is because the eyes are the most precious treasures of the human body; without clarity, one cannot exercise wisdom. Hence, the establishment of a specialized department for the eyes in ancient times was justified. Nowadays, people consider external eye conditions easy to recognize and often engage in this practice with superficial knowledge. Once involved in what is regarded as a minor art or lowly trade, they tend to slight it and pay little attention to it. Consequently, there are no excellent books on the subject, and transmission of knowledge does not reach suitable individuals. My fortune was unfavorable; coinciding with the passing of my father, my vision began to fail, and my scholarly pursuits fell into disarray. As the Confucians of old stated: "To waste years without bestowing favors upon others is merely an excrescence within Creation." Therefore, I extensively purchased medical texts, scrutinizing all that pertained to eye conditions. Through self-treatment and treating others, my efficacy doubled that of veteran physicians, thereby using this endeavor to cultivate virtue and remedy past faults. However, regarding internal cataracts and head wind disorders, I had not yet penetrated the secrets of acupuncture and moxibustion, inevitably inviting criticism for incompleteness. Someone remarked: "There is a master at Peifeng Mountain who excels in this technique; he promises that no case he accepts remains uncured. Would any sincere person wish to see him?" I urgently requested an introduction and asked him to come quickly. Upon his arrival, his demeanor was solemn and upright, a magnificent man. Our conversation revealed his extraordinary nature, and I requested to become his student immediately. Master Peifeng was originally from an old prestigious family in Jiangxia, possessing high moral character and great prestige. He never spoke of money; while socializing with guests in scenic areas, he would spend his purse freely. He was essentially a knight-errant disguised as an artist. I served him diligently day and night, daring not to slacken. After grasping his core methods, I firmly declined further stay and returned south. We held a farewell banquet in the suburbs. At that time, mountain leaves were red like clouds, and river waves flew white. Sighing, I recited: "Entering Min region through Ma'er Pass with the wind, three cycles of stars and frost have turned my temples silver." He continued: "Knowing you leave a favorable glance everywhere, I long fear the rivers and lakes will ruin you." His words were crisp and profound. The master considered me a true confidant, laughed heartily, and rode away. Alas! With my talent, Huang Tingjing was not inferior or dull. Yet for such a minute matter, I devoted myself so intensely, spent so much capital, and treated others with such reverence, only then could my skill advance. Who says that one who understands the principles of the Great Origin can achieve perfection in medicine without being versed in Confucian learning? Shouldn't the demands on ophthalmology be stricter than on other diseases? Reflecting on antiquity and discussing matters, I felt compelled to speak. In the year Xinyou, during spring, rain persisted for ten days. I reviewed my notes on symptoms and treatments, compiled them into volumes by category, titled *Mujing Dacheng* (The Complete Canon of Eye Classics), kept it hidden like a worthless stone, and dared not publish it. Minister Wei, a Grand Secretary, saw it once and was deeply impressed, saying: "This is a useful book; I wish to share it with the world," and wrote a preface urging its publication. Minister Wei was a great scholar from a prominent region, known for his rigorous discourse. I humbly request contemporary sages to critique and amend it, to instruct one as inadequate as I am. Preface by Huang Tingjing, pseudonym Bu Chenzi of Suichuan.