治风热上攻, 火眼赤痛, 骤生云翳, 外障遮睛.
防风一钱 石膏一钱 滑石一钱 归尾一钱 赤芍八分 羌活八分
荆芥五分 黄芩五分 连翘五分 川芎五分 桔梗五分 麻黄五分
白术五分 大黄五分 芒硝五分 独活五分 元参五分 木贼五分
菊花五分 白蒺藜五分 蝉退五分 草决明五分 薄荷四分 栀子四
分 蔓荆子四分 细辛三分 甘草三分. 加清茶叶五分, 水煎服.
【注】目之病内障者, 昏暗不明而不肿痛, 得之于内, 七情动中, 劳
伤心肾也. 外障者, 赤肿而痛, 晴不昏暗, 得之于六淫所袭, 热蕴经
络也. 故内障多虚, 外障多实. 子和曰: 眼无火不病, 非止内障, 正
指外障而立言也. 外障赤肿而痛者 , 或散外邪, 或泻内热, 或并解
之,可立愈也. 其有风火上攻, 留而不散, 凝结云翳, 掩其光明者,
又非或散, 或下, 所能即愈也. 洗刀散方既可以攻风热, 又可以去云
翳,是一方而兼擅其长也. 方中用防风通圣散全剂, 是主以风热也.
倍归尾, 赤芍, 是治风先治血, 血行风自灭也. 加羌, 独活, 蔓荆子
,倍防风, 是袪风而专在太阳表也, 太阳之里少阴也, 故又加细辛直
走少阴. 加元参下安肾火, 是治表而顾及其里也. 其加木贼, 蝉蜕,
草决明, 白蒺藜, 菊花者, 是佐诸祛风清热之群药, 以消风热骤壅之
云翳也.
治疗风热上攻，火眼红肿疼痛，突然生出云翳，外障遮蔽瞳孔。
防风一钱 石膏一钱 滑石一钱 当归尾一钱 赤芍八分 羌活八分
荆芥五分 黄芩五分 连翘五分 川芎五分 桔梗五分 麻黄五分
白术五分 大黄五分 芒硝五分 独活五分 玄参五分 木贼五分
菊花五分 白蒺藜五分 蝉蜕五分 草决明五分 薄荷四分 栀子四分
蔓荆子四分 细辛三分 甘草三分。加清茶叶五分，水煎服。
【注】眼睛的病症中，内障表现为昏暗不明且不肿痛，病因在于内部，由七情（喜、怒、忧、思、悲、恐、惊）扰动内脏，劳伤心肾所致。外障表现为红肿且痛，视力不昏暗，病因在于六淫（风、寒、暑、湿、燥、火）侵袭，热邪蕴结在经络中。所以内障多属虚证，外障多属实证。张子和说：眼睛没有火邪就不会生病，这话不仅仅指内障，主要是针对外障而言的。对于外障红肿疼痛的情况，或者疏散外邪，或者泻除内热，或者两者同时解决，可以立即痊愈。那些有风火上攻，滞留不散，凝结成云翳，遮蔽视力的情况，又不是单纯疏散或泻下所能立即治愈的。洗刀散这个方剂既可以攻逐风热，又可以去除云翳，是一方而兼擅其长。方中使用防风通圣散的全剂量，是主治风热。加倍使用当归尾和赤芍，是因为治疗风病要先治血，血行则风自灭。加入羌活、独活、蔓荆子，加倍防风，是为了祛风而专门针对太阳经表证，太阳经的里经是少阴经，所以又加入细辛直接走窜少阴经。加入玄参以向下安定肾火，这是治疗表证而兼顾里证。加入木贼、蝉蜕、草决明、白蒺藜、菊花，是为了辅助那些祛风清热的药物群体，以消除风热突然壅滞形成的云翳。
Indicated for wind-heat attacking upward, causing fiery eyes with redness and pain, sudden formation of nebula (cloudy opacity on the cornea), and external obstructions blocking the pupil.
Fangfeng (Saposhnikoviae Radix) 1 qian, Shigao (Gypsum Fibrosum) 1 qian, Huashi (Talcum) 1 qian, Guiwei (Radix Angelicae Sinensis Cauda) 1 qian, Chishao (Radix Paeoniae Rubra) 8 fen, Qianghuo (Notopterygii Rhizoma et Radix) 8 fen,
Jingjie (Schizonepetae Spica) 5 fen, Huangqin (Scutellariae Radix) 5 fen, Lianqiao (Forsythiae Fructus) 5 fen, Chuanxiong (Ligustici Chuanxiong Rhizoma) 5 fen, Jiegeng (Platycodonis Radix) 5 fen, Mahuang (Ephedrae Herba) 5 fen,
Baizhu (Atractylodis Macrocephalae Rhizoma) 5 fen, Dahuang (Rhei Radix et Rhizoma) 5 fen, Mangxiao (Natrii Sulfas) 5 fen, Duohuo (Angelicae Dahuricae Radix) 5 fen, Yuanshen (Scrophulariae Radix) 5 fen, Muzei (Equiseti Herba) 5 fen,
Juhua (Chrysanthemi Flos) 5 fen, Baijili (Tribuli Fructus) 5 fen, Chantui (Cicadae Periostracum) 5 fen, Caojueming (Cassiae Semen) 5 fen, Bohe (Menthae Haplocalycis Herba) 4 fen, Zhizi (Gardeniae Fructus) 4 fen,
Manjingzi (Vittaginis Fructus) 4 fen, Xixin (Asari Radix et Rhizoma) 3 fen, Gancao (Glycyrrhizae Radix et Rhizoma) 3 fen. Add Qingchaye (Clear Tea Leaves) 5 fen, decoct in water and take orally.
[Note] Regarding eye diseases, internal obstructions (Neizhang) manifest as dim vision without swelling or pain, originating internally due to the disturbance of the Seven Emotions (Joy, Anger, Worry, Thought, Sadness, Fear, Fright) affecting the viscera, damaging the Heart and Kidney through overexertion. External obstructions (Waizhang) manifest as redness, swelling, and pain, with clear vision not being dimmed, originating from the invasion of the Six Exogenous Pathogens (Wind, Cold, Summerheat, Dampness, Dryness, Fire), where heat accumulates in the meridians. Therefore, internal obstructions are mostly deficiency patterns, while external obstructions are mostly excess patterns. Zhang Hezi stated: "The eyes do not become diseased without fire." This statement does not only refer to internal obstructions but is primarily made regarding external obstructions. For external obstructions characterized by redness, swelling, and pain, one may either disperse exogenous pathogens, purge internal heat, or address both simultaneously, leading to immediate recovery. However, in cases where wind-fire attacks upward, lingers without dispersing, condenses into nebulae, and obscures clarity, neither simple dispersion nor purging can achieve immediate cure. The formula Xidao San can both attack wind-heat and remove nebulae, excelling in both aspects. The formula uses the full dosage of Fangfeng Tongsheng San, targeting wind-heat primarily. Doubling the dosage of Guiwei and Chishao follows the principle that treating wind requires treating the blood first; when blood circulates, wind extinguishes itself. Adding Qianghuo, Duohuo, Manjingzi, and doubling Fangfeng aims to dispel wind specifically at the Taiyang exterior level. Since the interior counterpart of the Taiyang meridian is the Shaoyin meridian, Xixin is added to directly penetrate the Shaoyin. Adding Yuanshen helps to descend and calm kidney fire, addressing the interior while treating the exterior. Adding Muzei, Chantui, Caojueming, Baijili, and Juhua serves to assist the group of wind-dispelling and heat-clearing herbs in eliminating the nebula formed by the sudden stagnation of wind-heat.