夫眼疾之医,虽分症类,而其中病源,不可不深思而熟视也。夫疾有久新,症有轻重,须分表里、风热、气
热、湿热、实热。而新病者,皆因内积热毒之轻,循经络而上头目,遇外风寒所触而发者,必须先发表风邪,后
乃远其火热,黄连、黄芩以泻火,防风、薄荷以疏风,兼以麻黄、苍术之类。如无风寒所逼,惟血壅上,宜用大
黄、当归、防己坠下之剂。久眼昏蒙所晓,宜用当归、地黄、防风、羌活之类,有翳膜加木贼、蒺藜、蝉蜕、决
明等剂。如胞合眼皮不开此乃寒邪之气伤胞,宜行气之药,青皮、黄 、香附兼以风药佐之。血滞者宜调血,赤
芍、归尾、鼠粘。如头痛者羌活、白芷、蔓荆, 本、川乌之类,佐以风药防风、荆芥、玄参、柴胡、细辛用之
必当也。如眼眩晕昏 十分作痛,但虚肿痛及眼眶,此乃痰饮所患,宜服二陈汤兼佐以风药。如肿胀暗痛热泪难
禁者,苦寒之药宜然,但视人之形气虚实,体之盛衰,务究其内外浅深,不可专书全在人之活法。方书者乃前人
立法之规,使后无失其序,如归于症者则缓可以寻方,倘暴发者变动于顷刻,苟不明于药性寒温,病势之缓急,
而使之疗,非徒无益而反害之矣。予掇拾诸家之方,赘成歌括六十余首,此平昔应验之神方也,若用意熟记,则
不思忖而了然矣,若能知抽添之工夫,加减之意趣,真可谓眼科中之至宝哉。后之学人,当以予之用心,珍之重
之,俾术不轻而身不贱矣。内障一书,乃心授之法,故不形于纸笔,如若泛泛,岂仁人君子哉!
Physicians treating eye diseases, although categorizing symptoms into various types, must deeply contemplate and carefully examine the underlying pathogenesis. Diseases vary in duration (acute vs. chronic) and severity, requiring differentiation between exterior and interior patterns, as well as wind-heat, qi-heat, damp-heat, and excess-heat. Acute eye conditions often arise from mild accumulation of internal heat-toxins that ascend along the meridians to the head and eyes, triggered by external wind-cold invasion. Treatment must first release the exterior wind-pathogen, then clear the internal fire-heat; Coptis Rhizome (Huanglian, 黄连) and Scutellaria Root (Huangqin, 黄芩) are used to purge fire, Saposhnikovia Root (Fangfeng, 防风) and Mint (Bohe, 薄荷) to disperse wind, supplemented by herbs such as Ephedra Stem (Mahuang, 麻黄) and Atractylodes Rhizome (Cangzhu, 苍术). If there is no external wind-cold constraint, but merely blood stasis obstructing the upper body, purgative agents containing Rheum Radix et Rhizoma (Dahuang, 大黄), Angelica Sinensis Radix (Danggui, 当归), and Stephania Tetrandra Saponins (Fangji, 防己) should be employed. For chronic visual blurring, Angelica Sinensis Radix (Danggui, 当归), Rehmannia Root (Dihuang, 地黄), Saposhnikovia Root (Fangfeng, 防风), and Notopterygium Rhizome et Radix (Qianghuo, 羌活) are suitable; if nebulae (翳膜) are present, add Equisetum Hiemale Caulis (Muzei, 木贼), Tribulus Fruit (Jili, 蒺藜), Cicada Slough (Chantui, 蝉蜕), and Cassia Seed (Juemingzi, 决明子). If the eyelids are fused and cannot open, this indicates cold-pathogen damaging the eyelid tissue; qi-regulating herbs such as Tangerine Peel (Qingpi, 青皮), Phellodendron Bark (Huangbai, 黄柏 - inferred from context "黄 "), and Cyperus Rhizome (Xiangfu, 香附) should be used, assisted by wind-dispersing herbs. For blood stagnation, blood-invigorating herbs like Red Peony Root (Chishao, 赤芍), Angelica Sinensis Tail (Guiwei, 归尾), and Burdock Fruit (Niubangzi, 鼠粘子) are appropriate. In cases of headache, Notopterygium Rhizome et Radix (Qianghuo, 羌活), Angelica Dahurica Radix (Baizhi, 白芷), Vitex Fruit (Manjingzi, 蔓荆子), Ligusticum Chuanxiong Rhizome (Gaben, 藁本), and Aconite Lateral Root Preparata (Chuanwu, 川乌) may be used, assisted by Saposhnikovia Root (Fangfeng, 防风), Schizonepeta Spike (Jingjie, 荆芥), Scrophularia Root (Xuanshen, 玄参), Bupleurum Root (Chaihu, 柴胡), and Asarum Root (Xixin, 细辛); such usage will certainly be appropriate. For severe dizziness, blurred vision, intense pain, and swelling with discomfort around the eye orbits caused by phlegm-fluid retention, Erchen Decoction (Erchen Tang, 二陈汤) combined with wind-dispersing herbs is indicated. For swelling, dull pain, and uncontrollable hot tears, bitter-cold herbs should be applied, but one must assess the patient's physical constitution and qi deficiency or excess, as well as the depth and location of the pathology, avoiding rigid adherence to texts and relying instead on flexible clinical judgment. Medical texts provide established rules for future generations to maintain order; for chronic conditions, formulas can be sought gradually, whereas acute conditions change rapidly. Without understanding the thermal nature of herbs and the urgency of the disease, treatment may cause harm rather than benefit. I have compiled over sixty mnemonic verses from various sources, representing proven effective formulas. Memorizing them thoroughly allows for instant recall; mastering the principles of addition and subtraction makes them true treasures of ophthalmology. Future practitioners should cherish these teachings, valuing the art so it is not despised and their status is respected. The treatise on internal cataracts relies on oral transmission and heart-mind instruction, hence not recorded in writing; to speak superficially would not be the act of a benevolent gentleman.