生人之身，耳司听而目司视，故五官之用，耳目居多，而耳与目较，即目尤较重。何也？眯于目，而
以耳代目者为废人，不聪于耳，而以明兼听者，不失为全士也。昔者炎帝悯天下人之苦于疫疠，而伤夭
札也，取草木之实，含英咀华，辨其寒温燥热之性，识其君臣佐使之宜，制为方书，民有疾痛，药辄
愈。而书乃何独疏于疗目耶？盖上古嗜欲未源，葆命
有利，目之受病极少。厥后知识日启，内摇其心，
外憾其精。心有疾则血不养目，肾有病则瞳人昏暗，肺
有症则白珠血丝日生，肝有患则翳膜变起。此皆情欲
所感，初不自觉，积久而视乃昏，始知目之为病源也。
呜呼！舋民之生，要无过不利当途，如问炎帝之时，
其有此乎？故百书多略之者，非疏也。孙真人着《眼
科秘诀》，以补炎帝方书之未备，而其本常秘，未能
广其传矣。于云从少时，力学过苦目伤，医不得愈，
祷于城隍之神，梦授书四帙，觉而遇王覆万传真人书，
宛然如梦中，云从辄根据其方治之，目得瘥。如人有病
目者，亦辨其所受病复治之，罔弗疗。云从乃更为《阐
微》、《入门》传之天下后世，得诸冯隋昆铁树梨
枣。呜呼！是书一出，又岂在炎帝方书下哉？予宦
游三十余年，簿书难章，目劳神疲，短于视，云
从为予药之，得复其元，云从之功也。今云从老矣，
幸其书得传，吾愿世之读是书者，望其宝之如方书，
而勿忘云从之功为焉，则感矣。
时康熙辛巳春王吉旦奉直大夫知胶州事平陵王基昌序
人生在世，耳朵负责听觉，眼睛负责视觉，所以五官的功能中，耳目最为重要。而在耳与目的比较中，眼睛的作用尤其重大。为什么呢？因为如果眼睛失明而用耳朵代替视觉的人就是废人，但如果听力不灵敏而视力明亮兼能听辨的人，仍不失为健全之士。从前炎帝怜悯天下百姓遭受瘟疫和早夭之苦，于是采集草木的果实，细细品味，辨别它们寒、温、燥、热的药性，识别君、臣、佐、使的配伍适宜度，编撰成方书。百姓若有病痛，用药随即痊愈。然而这本书为何唯独在治疗眼病方面有所疏漏呢？大概是因为上古时期人们的嗜欲尚未泛滥，保养生命有利，眼睛患病的情况极少。后来人的知识日益开启，内心动摇心神，外物耗损精气。心脏有病则血液不能滋养眼睛，肾脏有病则瞳孔昏暗，肺部有病症则白眼球血丝日渐增多，肝脏有疾患则翳膜产生变化。这些都是情欲所感，起初并不自觉，积累久了视力才变得昏花，这才知道眼睛患病的根源所在。唉！百姓的生活，最重要的是道路通畅，就像问炎帝那个时代，会有这种情况吗？所以很多书籍对此多略写，并非疏忽。孙思邈（孙真人）撰写《眼科秘诀》，用来补充炎帝方书中未完备的内容，但它的原本常被秘藏，未能广泛流传。于云从年轻时，努力学习时因用眼过度受伤，医生无法治愈，向城隍神祈祷，梦中授受四卷书，醒来后遇到王覆万传授的真人手书，内容宛如梦中所示，云从就依据其中的方子治疗，眼睛得以痊愈。如果有患眼病的人，也辨别其病因再进行治疗，没有不治愈的。云从于是又编写了《阐微》、《入门》传给天下后世，通过冯隋昆等人刻印在铁树梨枣之上（指雕版印刷）。唉！这本书一出，难道会在炎帝的方书之下吗？我宦游三十多年，处理公文繁杂，眼睛劳累精神疲惫，视力短浅，云从为我用药治疗，使我恢复元气，这是云从的功劳。如今云从年老了，幸好他的书得以流传，我希望世上读这本书的人，希望他们像珍视方书一样珍视它，并且不要忘记云从的功劳，那就感激不尽了。
时康熙辛巳年春季第一个吉日，奉直大夫、胶州知州平陵人王基昌作序
In human life, the ears are responsible for hearing and the eyes for vision; thus, among the five sense organs, the eyes and ears play the predominant roles. Comparing the two, the eyes are even more critical. Why? For one who is blind in the eyes but uses the ears to substitute for vision becomes an invalid, whereas one whose hearing is not acute but whose vision is clear and can also listen remains a whole person. In ancient times, Yan Di (Shennong, the Divine Farmer) pitied the suffering of the people from epidemics and premature death. He gathered fruits of herbs and trees, tasted them carefully, distinguished their properties of cold, warm, dry, and hot, identified the appropriate roles of sovereign, minister, assistant, and courier in prescription formulation, and compiled medical texts. When the people suffered from diseases, medicines brought immediate recovery. Yet why did this text neglect the treatment of eye diseases? It was likely that in ancient times, desires had not yet proliferated, preserving life was favorable, and eye diseases were extremely rare. Later, as knowledge expanded, the mind was agitated internally, and essence was exhausted externally. Heart disease leads to blood failing to nourish the eyes; kidney disease causes dimness of the pupils; lung pathology results in increasing blood vessels on the sclera (white part of the eye); liver disorders lead to the formation of corneal opacities or membranes. These are all caused by emotional desires, initially unnoticed, accumulating over time until vision dims, at which point the source of eye disease is recognized. Alas! The livelihood of the people relies primarily on unobstructed paths, akin to asking if such conditions existed in the time of Yan Di. Therefore, many books omit this topic, not out of negligence. Sun Simiao (Sun Zhenren) wrote "Secrets of Ophthalmology" to supplement the deficiencies in Yan Di's medical texts, but its original manuscripts were often kept secret and failed to spread widely. Yu Cong, in his youth, studied hard and injured his eyes through overuse; physicians could not cure him. He prayed to the City God (Chenghuang), received four volumes of a book in a dream, and upon waking, encountered a manuscript transmitted by Wang Fuwan, which matched the dream exactly. Cong applied the prescriptions found therein, and his eyes recovered. For others with eye diseases, he diagnosed the specific etiology and treated them, achieving universal cures. Cong then compiled "Chan Wei" (Elucidating Subtleties) and "Ru Men" (Introduction) to transmit to the world and future generations, having them printed via woodblock printing by Feng Suikun and others. Alas! With the publication of this book, how could it be inferior to Yan Di's medical texts? I served in official posts for over thirty years, burdened by complex administrative documents, leading to eye strain and mental fatigue, resulting in poor vision. Cong medicated me, restoring my vitality; this is Cong's merit. Now that Cong is old, fortunately, his book has been preserved. I wish that readers of this book will treasure it as they would medical texts and never forget Cong's contributions, thereby expressing deep gratitude.
Preface written on the first auspicious day of the spring of Xinsi year in the Kangxi reign by Wang Jichang, Gentleman Attendant of Benzhi (Fengzhi Dafu), Prefect of Jiaozhou, from Pingling.