味无考，性寒无毒，入心经。主手足皮肤逆胪，镇心润颜，止渴坠痰，点目去膜，塞耳
除聋，催生下死胎，又主小儿惊热风癫。须未经钻眼者，研细筛过，再研二万下方用。
按∶珍珠为水精所孕，专能制火，且其性镇重，心经之所由入也。研之不细，伤人脏腑，
功未获奏，害已随之。
雷公云∶须取净新者，以绢袋盛之。然后用地榆、五加皮、五方草三味各四两，细锉了。
又
三件药笼之，以浆水煮三日夜，勿令火歇，日满出之，用甘草汤洗之，令净，后于臼中捣令
细，以绢罗重重筛过，却更研二万下用，凡使要不伤破钻透者，方可用。
味咸，性平无毒，入肝经。主风热青盲内障，骨蒸劳热，久服益精，九孔七孔者良。以
面裹煨，磨去其外黑处并粗皮，捣细，于乳钵中再研细极，永忌山桃。
按∶石决明本水族也，宜足以生木而制阳光，故独入肝家，为眼科要药。命曰决明者，
丹溪所谓以能而名也。
雷公云∶凡使先去上粗皮，用盐并东流水于大磁中，煮一伏时，漉出拭干，捣为末，研
如粉，却入锅中，以东流水淘三度，日干，再研一万匝，入药服至十两，永不得食山桃，令
人丧目。凡修事五两，以盐半分取，则第二度淘用地榆五加皮阿胶各十两。
味咸甘，性平无毒，入心脾肝三经。主阴虚不足，骨蒸劳热，症瘕疟 ，五痔阴蚀，
四肢重弱，血麻痹风疾，产前后痢疾，惊恚气心腹痛，伤寒劳复，肌体寒热欲死，小儿囟门
不合，及头疮，女子赤白漏下，及阴痒。逐瘀血，续筋骨，催生益智。自败者更佳，酥炙用
。龟尿、主耳聋久嗽、断疟。俱畏狗胆。恶沙参蜚蠊。
按∶龟甲禀壬癸之气而生，其补阴也甚捷，心主血，肝藏血，脾裹血，故并入之。骨蒸
云云等症，靡非阴虚所致，用此主之，不亦宜哉？欲取其尿者，取龟置磁器中，以镜照之，
既见镜中影，则淫发而失尿。另有一种夹蛇龟中心折者，不堪服食。生捣其肉， 敷蛇毒最
良，败龟版及自死之龟，形肉渗烂，甲内性气俱全，故其功力较倍，今《本经》以卜师钻灼
者为是，恐非，灼者不过烧炙焦黑而已，与生者何异？又何取久，特加败字，谆谆以示人耶。
【珍珠】
味道无法考证，性质寒凉，无毒，归入心经。主治手足皮肤逆胪（皮肤肿胀突起），镇心安神，润泽容颜，止渴降痰，点眼去除翳膜，塞耳治疗耳聋，催产排出死胎，又主治小儿惊风、热病及癫狂。必须选用未经过钻孔的珍珠，研成细粉并筛选，再研磨两万遍后方可使用。
按语：珍珠是水精孕育而成，专门能制约火邪，且其性质沉重，因此归入心经。如果研磨得不细致，会损伤脏腑，功效尚未显现，危害已随之而来。
雷公说：必须选取干净新鲜的，用绢袋盛装。然后用地榆、五加皮、五方草三味药各四两，切碎。再用这三味药包裹珍珠，用米浆水煮三天三夜，不要让火熄灭。时间到了取出，用甘草汤清洗洁净，然后在臼中捣碎，用绢筛层层筛选，再研磨两万遍使用。凡是要使用的珍珠，不能破损或钻透，才可以使用。
【石决明】
味道咸，性质平和，无毒，归入肝经。主治风热引起的青盲内障（视力模糊或失明），骨蒸劳热（阴虚发热），长期服用可益精，以有九孔或七孔的为优良。用面粉包裹煨熟，磨去外部黑色部分及粗皮，捣碎后在乳钵中再次研磨至极细，永远禁忌食用山桃。
按语：石决明本属水族，适宜足以生木而制约阳光（肝属木，主目，畏强光），所以独入肝家，是眼科的重要药物。命名为“决明”，正如丹溪所说，是因为它能明目而得名。
雷公说：凡是使用石决明，先去掉上部的粗皮，用盐和东流水在大磁器中煮一个时辰（约两小时），捞出擦干，捣成粉末，研磨如粉状，再放入锅中，用东流水淘洗三次，晒干，再研磨一万匝，入药服用可达十两，永远不得吃山桃，否则会使人失明。凡是修整处理五两石决明，取半分盐，则第二次淘洗用地榆、五加皮、阿胶各十两。
【龟甲】
味道咸甘，性质平和，无毒，归入心、脾、肝三经。主治阴虚不足，骨蒸劳热，症瘕疟疾，五种痔疮及阴部腐蚀溃烂，四肢沉重乏力，血痹麻痹风疾，产前产后痢疾，惊恐愤怒导致的心腹疼痛，伤寒病愈后的复发，肌体寒热欲死，小儿囟门不合，以及头疮，女子赤白带下，以及阴部瘙痒。能逐瘀血，续筋骨，催生益智。自然死亡的龟甲更佳，用酥油炙烤使用。龟尿，主治耳聋久嗽、截断疟疾。都畏惧狗胆。厌恶沙参和蜚蠊（蟑螂）。
按语：龟甲禀受壬癸（水）之气而生，其补阴作用非常迅速。心主血，肝藏血，脾裹血，所以并入这三经。骨蒸等病症，无非都是阴虚所致，用此药主治，不也是适宜的么？想要获取龟尿，将龟放在磁器中，用镜子照射它，当它看到镜中的影子时，就会发情并排出尿液。另有一种夹蛇龟，中心折断的，不堪服用。生捣其肉，敷治蛇毒最好。败坏的龟版及自死的龟，形体肉质腐烂，但甲内的性气俱全，所以功力加倍。现在《本经》认为由卜师钻灼的是好的，恐怕不对，钻灼者不过是烧炙焦黑而已，与生的有什么区别？又何必长久保存，特意加上“败”字，谆谆教导人们使用呢。
[Zhuzhen (Pearl)]
The taste is unverified; the nature is cold and non-toxic; it enters the Heart Meridian. It primarily treats "ni lu" (swelling and protrusion of skin on hands and feet), calms the Heart, moistens the complexion, relieves thirst, descends phlegm, removes corneal membranes when applied to the eyes, cures deafness when inserted into the ears, induces labor to expel dead fetuses, and also treats pediatric convulsions, heat diseases, and epilepsy. Only pearls that have not been drilled should be used. They must be ground into fine powder, sifted, and then ground twenty thousand times before use.
Commentary: Pearl is conceived from the essence of water; it specializes in restraining Fire. Due to its heavy nature, it enters the Heart Meridian. If not ground finely enough, it will damage the Zang-Fu organs; harm will follow before efficacy is achieved.
Lei Gong said: One must select clean and fresh pearls, store them in a silk bag. Then, take four liang each of Diyu (Sanguisorbae Radix), Wujia Pi (Acanthopanacis Cortex), and Wufang Cao (Hedyotis diffusa or similar herb), finely chopped. Wrap the pearl in these three herbs, boil in rice vinegar/water for three days and nights, ensuring the fire does not go out. Upon completion, remove and wash thoroughly with Gancao (Glycyrrhizae Radix et Rhizoma) decoction. Then pound in a mortar, sieve repeatedly through silk gauze, and grind another twenty thousand times. Any pearl used must not be broken or perforated.
[Shijueming (Haliotidis Concha)]
The taste is salty; the nature is neutral and non-toxic; it enters the Liver Meridian. It treats "qing mang" (blindness due to wind-heat) and internal cataracts, bone-steaming consumptive fever, and benefits essence with long-term use. Those with nine or seven holes are superior. Wrap in flour and roast until cooked, rub off the outer black layer and coarse skin, pound into pieces, and further grind in a mortar until extremely fine. Shan Tao (Prunus armeniaca var. ansu seed) is strictly contraindicated.
Commentary: Shijueming originates from aquatic life; it nourishes Wood (Liver) and restrains Yang brightness (eyes/light). Thus, it uniquely enters the Liver Home and is an essential herb for ophthalmology. It is named "Jue Ming" (Resolving Brightness), as Danxi stated, named after its function.
Lei Gong said: When preparing Shijueming, first remove the coarse outer skin. Boil in salt and east-flowing water in a large porcelain vessel for one "fu shi" (approx. 2 hours). Remove, dry, pound into powder, and grind until powdery. Then place in a pot, wash three times with east-flowing water, sun-dry, and grind ten thousand times. The dosage for medicinal use can reach ten liang. Shan Tao must never be consumed, as it causes blindness. For every five liang processed, use half a portion of salt. For the second washing, use Diyu, Wujia Pi, and Ejiao (Colla Corii Asini) each in amounts of ten liang.
[Guijia (Testudinis Carapax et Plastrum)]
The taste is salty and sweet; the nature is neutral and non-toxic; it enters the Heart, Spleen, and Liver meridians. It treats Yin deficiency insufficiency, bone-steaming consumptive fever, masses and malaria, five types of hemorrhoids and genital erosion, heaviness and weakness of the four limbs, blood bi and paralytic wind disorders, dysentery before and after childbirth, heart and abdominal pain due to fright and anger, recurrence of typhoid after recovery, severe chills and fever approaching death, unclosed fontanelles in children, head sores, red and white leukorrhea in women, and vaginal itching. It drives out blood stasis, reconnects bones and sinews, induces labor, and enhances intelligence. Naturally deceased turtle shells are better; use after roasting with su (butter/ghee). Gui Niao (Turtle urine) treats chronic deafness and cough, and interrupts malaria. All parts fear Gou Dan (Canis Gallus Bile) and are inimical to Shashen (Adenophorae Radix) and Feilian (Blattariae).
Commentary: Guijia is born from the Qi of Ren and Gui (Water); its ability to tonify Yin is very rapid. The Heart governs Blood, the Liver stores Blood, and the Spleen envelops Blood; thus, it enters these three meridians. Symptoms like bone-steaming are all caused by Yin deficiency; using this to treat them is appropriate. To obtain turtle urine, place the turtle in a porcelain vessel and shine a mirror upon it. Seeing its reflection triggers mating behavior and urination. There is another type called "She Snake Turtle" with a broken center, which is unsuitable for consumption. Fresh meat pounded and applied is best for snake venom. Damaged shells and naturally dead turtles, though flesh is rotten, retain their full medicinal properties and qi, thus doubling their efficacy. The *Ben Jing* considers shells drilled by diviners to be superior, which is likely incorrect. Drilled shells are merely scorched black; how do they differ from raw ones? Why preserve them for long? The term "damaged" is emphasized to instruct people properly.