还睛丸 治远年近日，一切目疾，内外翳障，攀睛 肉，烂弦风眼，及年老虚弱，目昏
多眵，迎风冷泪，及视物昏花，久成内障，此药最能降虚火升肾水，可宜久服，夜能读细字
人参 杏仁（泡，去皮尖） 肉苁蓉（酒洗，焙干） 杜仲（酒洗，炒） 牛膝（酒洗，炒）
石斛 枸杞子（各两半） 犀角（锉细末） 防风（各八钱） 菊花（去梗叶） 菟丝子（酒煮，焙干）
当归（酒洗，炒） 熟地（酒洗，焙干） 黄柏（酒洗，炒） 青葙子 枳壳（麸炒） 白茯苓（乳
蒸晒干） 蒺藜（杵，去刺，炒） 羚羊角（锉细末） 草决明 山药（各一两） 天冬（去心，焙
干） 麦门冬（去心，焙干） 生地（酒洗炒，各三两） 川芎（酒洗，炒） 黄连（酒洗，炒） 五
味子（敲破焙干） 甘草（炒，各七钱） 知母（酒炒，二两）
上除犀、羚角末另入，余为细末，炼蜜为丸，如桐子大。每服四五十丸，空心盐汤送下
一方内无当归、肉苁蓉、杜仲、黄柏、知母，亦名固本还睛丸。
古人云金针者，贵之也，金为五金之总名，铜铁金银皆是也。《本草》云∶马 铁
无毒，可作针。以马属午属火。火克金，能解铁毒，故用以作针。
煮针一法，《素问》原无，今世用之，欲温而泽也，是法有益而无害，故从之。
危氏书，用乌头、巴豆各一两，硫黄、麻黄各五钱，木鳖子、乌梅各十个，将针入水，
用砂锅内或 内煮一日，洗择之，再用止痛药没药、乳香、当归、花蕊石各五钱，又如前水
煮一日，取出，用皂角水洗，再于犬肉内煮一日，仍用瓦屑打磨净，端直，松子油涂之，常
近人气为妙。
\r金针式\p05-c21a7.bmp\r
金针柄以紫檀花梨木或犀角为之，长二寸八九分，如弓弦粗，两头钻眼，深三四分，用
上好赤金子，抽粗丝，长一寸，用干面调生漆嵌入柄眼内，外余六分许，略尖，不可太锋利
恐损瞳神，以鹅毛管套收，平日收藏匣内，临用时始取出之。
还睛丸：治疗病程长久或新近发生的一切眼疾，包括内外翳障、胬肉攀睛、烂弦风眼，以及年老体弱导致的视物昏花、眼屎多、迎风流泪等。此药最能降虚火、升肾水，适宜长期服用，夜间也能看清细小的字。
药材及剂量：人参、杏仁（去皮尖）、肉苁蓉（酒洗后焙干）、杜仲（酒洗后炒）、牛膝（酒洗后炒）、石斛、枸杞子（各一两半）、犀角（锉成细末）、防风（各八钱）、菊花（去梗叶）、菟丝子（酒煮后焙干）、当归（酒洗后炒）、熟地黄（酒洗后焙干）、黄柏（酒洗后炒）、青葙子、枳壳（麸炒）、白茯苓（乳蒸后晒干）、蒺藜（捣碎去刺后炒）、羚羊角（锉成细末）、草决明、山药（各一两）、天冬（去心后焙干）、麦门冬（去心后焙干）、生地黄（酒洗后炒）、川芎（酒洗后炒）、黄连（酒洗后炒）、五味子（敲破后焙干）、甘草（炒，各七钱）、知母（酒炒，二两）。
制法与用法：以上药物除犀角、羚羊角的细末另备外，其余药物研为细末，用炼蜜制成梧桐子大小的丸剂。每次服用四五十丸，空腹时用盐汤送服。
另一配方中不含当归、肉苁蓉、杜仲、黄柏、知母，也命名为固本还睛丸。
古人说“金针”，是表示珍贵之意。“金”是金属的总称，铜、铁、金、银都属于此类。《本草》记载：马脑石（一种铁矿石）无毒，可用来制作针具。因为马在五行中属午、属火，火能克金，所以能解除铁的毒性，因此用马脑石来制作针具。
煮针的方法，《素问》原文中并没有记载，但当今世人使用这种方法，是为了使针具温润且有光泽。这种方法有益无害，所以沿用下来。
危氏医书中记载的方法：使用乌头、巴豆各一两，硫黄、麻黄各五钱，木鳖子、乌梅各十个。将针放入水中，用砂锅（或陶罐）煮一天，洗净择出。再用止痛药没药、乳香、当归、花蕊石各五钱，像前法加水再煮一天。取出后，用皂角水洗，再放入犬肉中煮一天。最后仍需用瓦屑打磨干净，确保针身端正笔直，涂上松子油，平时常让人气熏养为好。
[图片：金针式]
金针的柄由紫檀、花梨木或犀角制成，长二寸八九分，粗细如弓弦。两头钻有孔洞，深三四分。用上好赤金子抽成的粗丝，长一寸，用干面粉调和生漆嵌入柄眼的孔内，外部剩余约六分，尖端略尖即可，不可太锋利，以免损伤瞳神。平时用鹅毛管套收纳，平日收藏在匣内，临用时才取出。
Huanjing Wan (Restore Vision Pill): Treats all eye diseases, whether of long-standing or recent onset, including internal and external nebulae (corneal opacities), pterygium (fleshy growth over the cornea), marginal blepharitis (rotten rim wind-eye), as well as dim vision, excessive ocular discharge, and cold tearing triggered by wind in the elderly or those with weak constitution. This medicine is most effective in descending deficient fire and ascending kidney water. It is suitable for long-term consumption, enabling one to read fine print even at night.
Ingredients: Ginseng Radix et Rhizoma (Renshen), Apricot Seed (Xingren, peeled and removed of tips), Cistanche Deserticola (Roucongrong, wine-washed and dried), Eucommia Bark (Duzhong, wine-washed and stir-fried), Achyranthes Root (Niuxi, wine-washed and stir-fried), Dendrobium Stem (Shihu), Goji Berry (Gouqizi) [each 1.5 liang]; Rhinoceros Horn (Xijiao, finely powdered), Saposhnikovia Root (Fangfeng) [each 8 qian]; Chrysanthemum Flower (Juhua, stems and leaves removed), Dodder Seed (Tusizi, wine-boiled and dried), Angelica Sinensis Root (Danggui, wine-washed and stir-fried), Prepared Rehmannia Root (Shudi, wine-washed and dried), Phellodendron Bark (Huangbai, wine-washed and stir-fried), Celosia Seed (Qingxiangzi), Bitter Orange (Zhiqiao, bran-stir-fried), Poria (Baifuling, steamed with milk and sun-dried), Tribulus Fruit (Jili, pounded and thorns removed, stir-fried), Aries Cornu (Lingyangjiao, finely powdered), Cassia Seed (Caojueming), Yam (Shanyao) [each 1 liang]; Ophiopogon Tuber (Tianmen, heart removed and dried), Ophiopogon Tuber (Maimen, heart removed and dried), Rehmannia Root (Shengdi, wine-washed and stir-fried), Ligusticum Rhizome (Chuanxiong, wine-washed and stir-fried), Coptis Rhizome (Huanglian, wine-washed and stir-fried), Schisandra Fruit (Wuweizi, cracked and dried), Licorice Root (Gancao, stir-fried) [each 7 qian], Anemarrhena Rhizome (Zhimu, wine-stir-fried, 2 liang).
Preparation and Administration: Except for the fine powders of Rhinoceros Horn and Aries Cornu which are kept aside, all other ingredients are ground into a fine powder. Honey is refined and used to form pills the size of paulownia seeds. Take 40-50 pills per dose, on an empty stomach, washed down with salted water.
Another prescription omits Angelica Sinensis Root, Cistanche Deserticola, Eucommia Bark, Phellodendron Bark, and Anemarrhena Rhizome; it is also named Guben Huanjing Wan (Solidify Root Restore Vision Pill).
The ancients said "Gold Needle" (Jinzhen), implying preciousness. "Jin" is the general term for metals, including copper, iron, gold, and silver. The *Bencao* states: Maghematite (Mati, a type of iron ore) is non-toxic and can be made into needles. Since the Horse corresponds to Wu (noon) and Fire, and Fire conquers Metal, it can resolve the toxicity of iron; thus, Maghematite is used to make needles.
The method of boiling needles is not originally recorded in the *Suwen* (Yellow Emperor's Inner Canon), but is used in modern times to make the needle warm and lustrous. This method is beneficial and harmless, so it is adopted.
In Wei Shi's medical book, the method uses 1 liang each of Aconite Lateral Root (Aotou) and Croton Seed (Badou), 5 qian each of Sulfur (Huang) and Ephedra Herb (Mahuang), and 10 each of Momordica Seed (Mubiezi) and Chinese Olive (Wumei). The needle is placed in water and boiled for one day in a clay pot (or earthenware jar), then washed and selected. Then, 5 qian each of Myrrh (Moyao), Frankincense (Ruxiang), Angelica Sinensis Root (Danggui), and Pyrite (Huaruishi) are added. Boiled again in water for one day as before, it is taken out, washed with soap pod water, and then boiled in dog meat for one day. Finally, it is polished clean with tile dust, ensuring it is straight and true, coated with pine nut oil, and ideally kept close to human warmth for maintenance.
[Image: Jinzhen Style]
The handle of the Gold Needle is made of Rosewood (Zitan), Red Sandalwood (Huali), or Rhinoceros Horn. It is two cun eight or nine fen long, thick as a bowstring. Eyes are drilled at both ends, three or four fen deep. Coarse wire drawn from high-quality red gold, one cun long, is embedded into the handle's eye using raw lacquer mixed with dry flour. About six fen remains exposed outside, slightly pointed, but not too sharp to avoid damaging the pupil spirit. It is stored in a goose feather tube and kept in a box daily, taken out only when needed.