医虽有专科，而病则无专病也。有专科则其术精，无专病则其症杂，吾故论目病而及于
兼症
焉。夫病之重者，莫如伤寒。仲景论太阳篇中，头热目赤。阳明篇中，目中不了了，睛不和
。少阳篇中，少阳中风，两耳无所闻，目赤，是伤寒兼目疾也。若夫中风头风，虚劳臌胀，
噎隔咳嗽，黄胆遗浊，疝瘕 疟泻痢，以及外科疮疡，女科胎产经带，儿科痘疹疳积，皆有
兼目疾者，不得不一一着明。仿《伤寒析义》之例，以垂诸简编，庶有成法可遵，而不至于
顾此失彼也。至于头风之害目，疳积之害目，患者极多，为本科之本病，故论之尤详切焉。
夫医有十三科，伤寒为第一，余科次之，眼科又次之。今以眼科而括诸科之全者，因虑业是
科
者，守一家之说，而不能广搜医籍，倘遇兼症，则曰此某科也，望望然去之，宁不贻识者之
笑乎？然欲概为疗治，使患目之人，并入于光明之域，必须博考诸家，临症乃能措手也。古
人立法，互有不同，有偏于寒者，有偏于热者，有偏于攻者，有偏于补者，熟究深思，化其
偏而得其全，则法皆尽善矣。故专者，专心之谓也，又专力之谓也，专其心，专其力，斯得
专其艺矣。且能专者，未有不能兼者也。因专而后能兼，因兼而后愈专，成德之士，岂一端
一节所能尽其长哉。
虽然医生有专门的科室，但疾病并没有专门固定的病种。有了专科，医术就能精湛；没有专病，症状就繁杂，所以我论述眼病时，也涉及到了兼症。
在严重的疾病中，没有比伤寒更重的了。张仲景在《伤寒论》太阳篇中提到：头热、目赤。在阳明篇中提到：目中视物不清，眼球转动不灵活。在少阳篇中提到：少阳中风，两耳听不见，目赤。这些都是伤寒兼有眼疾的情况。
至于中风、头风，虚劳、臌胀，噎膈、咳嗽，黄疸、遗精浊淋，疝气、瘕聚、疟疾、腹泻痢疾，以及外科疮疡，妇科胎产经带，儿科痘疹、疳积，都有兼患眼疾的，不得不逐一阐明。
仿照《伤寒析义》的体例，将其记录在书籍中，希望有成法可以遵循，从而不至于顾此失彼。
至于头风伤害眼睛，疳积伤害眼睛，患者极多，属于本眼科的本病，所以论述得尤为详细恳切。
医学分为十三科，伤寒是第一科，其他各科次之，眼科又排在后面。现在用眼科来概括其他各科的全部内容，是因为担心从事这一科的人，固守一家的学说，而不能广泛搜集医籍，如果遇到兼症，就说“这是某科的事”，茫然离去，难道不会让有见识的人嘲笑吗？
然而想要全面治疗，使患眼疾的人都能重见光明，必须广泛考证各家学说，临证时才能着手施治。
古人制定的治疗方法，互有不同，有的偏于寒凉，有的偏于温热，有的偏于攻邪，有的偏于补益。深入探究并深思熟虑，化解其偏颇而得其全面，那么方法就都尽善尽美了。
所谓“专”，是指专心，也是指专力。专心致志，全力以赴，这样才能精通这门技艺。而且能够专精的人，没有不能兼顾其他的。因为专精而后能兼顾，因为兼顾而后更加专精，成就德行的人士，难道仅靠一端一节就能穷尽其长处吗？
Although physicians have specialized departments, diseases do not have fixed, exclusive categories. Specialization allows for refined skills; the lack of exclusive disease categories results in complex symptoms. Therefore, when discussing eye diseases, I also address concurrent conditions (concurrent symptoms).
Among severe illnesses, none is more critical than Cold Damage Syndrome (Shanghan, a disease caused by cold pathogenic factors). In the Taiyang Chapter of Zhang Zhongjing's treatise, it is mentioned: heat in the head and redness of the eyes. In the Yangming Chapter: unclear vision and stiff eyeballs. In the Shaoyang Chapter: Shaoyang Wind-Strike syndrome, hearing loss in both ears, and redness of the eyes. These are examples of Cold Damage Syndrome accompanied by eye diseases.
Regarding Wind-Stroke, Head Wind (Headache due to wind), Consumption and Weakness, Abdominal Distension with Fluid Accumulation (Ascites), Dysphagia and Regurgitation, Cough, Jaundice, Spermatorrhea and Turbid Urination, Hernia, Masses, Malaria, Diarrhea, and Dysentery, as well as surgical sores and ulcers, gynecological pregnancy, childbirth, menstruation, and leukorrhea, and pediatric smallpox, measles, and Infantile Malnutrition (Ganji), all may present with concurrent eye diseases. These must be clarified one by one.
Following the example of *Shanghan Xiyi* (Analysis of the Meaning of Cold Damage), these are recorded in this book, hoping that established methods can be followed, thereby avoiding attending to one aspect while neglecting another.
Since Head Wind damaging the eyes and Infantile Malnutrition damaging the eyes involve a large number of patients and constitute primary diseases within the ophthalmology specialty, they are discussed in particular detail.
Medicine is divided into thirteen specialties. Cold Damage Syndrome is the first, other specialties follow, and Ophthalmology ranks lower. Currently, using Ophthalmology to encompass the entirety of other specialties is done out of concern that practitioners might adhere strictly to their own school's theories without broadly consulting medical literature. If they encounter concurrent conditions, they might dismiss them saying, "This belongs to another specialty," and walk away in confusion. Would this not invite ridicule from knowledgeable experts?
However, to provide comprehensive treatment and restore sight to those suffering from eye diseases, one must extensively research various schools of thought and be prepared to act clinically. Ancient physicians established different methods: some leaned towards cold-natured treatments, others towards warm-natured ones; some emphasized purging (attacking pathogens), while others emphasized tonifying (supplementing deficiency). By thoroughly investigating and deeply contemplating, resolving biases to achieve a holistic approach, all methods become perfect.
Thus, "specialization" refers to focused attention and dedicated effort. With focused mind and dedicated effort, one masters the art. Moreover, those who can specialize are invariably capable of integration. Through specialization, one achieves integration; through integration, one becomes even more specialized. Can scholars of virtue exhaust their capabilities through merely isolated aspects or partial measures?