老子曰∶五色令人目盲，五音令人耳聋。
彭祖曰∶淫声哀音，怡心悦耳，以致荒耽之祸。如此何以长生？
孔子∶非礼勿视，非礼勿听。
孟子曰∶伯夷目不视恶色，耳不听淫声。
孙真人曰∶生食五辛，节熟食饮，极目远视，夜读注疏，久居烟火，博弈不休，饮酒不已，
热餐面食，抄写多年，雕镂细巧，房室不节，泣泪过多，月下观书，夜视星月，刺头出血多，日
没后读书，数向日月轮看，极目远视山川草木，驰骋田猎，冒涉风霜，迎风追兽，日夜不息，皆
丧明之由，慎之，慎之。
书云∶心之神发乎目，久视则伤心；肾之精发乎耳，久听则伤肾。
耳听淫声，目好色美，口嗜滋味，则五脏擂动而不定，血气流荡而不安，精神飞越而不守。
正气既散，淫邪之气乘此生疾。
叙书曰∶久视日月星辰损目，路井莫顾，损寿。故井汲水沸勿塞，令人目盲耳聋， 杀看斗
则气结。五色皆损目，惟皂湖屏风可助目力。
《淮南子》曰∶五色乱目，使目不明；五声讹耳，使耳不聪。又曰∶耳目曷能久动劳而不息乎？
有年八十余，眸子了然，夜读蝇头字。云∶别不服药，但小不食畜兽肝。人以《本草》羊肝
明目而疑之。余曰∶羊肝明目，性也，他肝不然。畜兽临宰之时，忿气聚于肝。肝主血，不宜于
目明矣。
老子说：缤纷的色彩使人目盲，嘈杂的音乐使人耳聋。
彭祖说：淫靡哀婉的声音，虽然能取悦心耳，却会导致荒废沉溺的灾祸。像这样怎么能长生不老呢？
孔子说：不符合礼制的不看，不符合礼制的不听。
孟子说：伯夷不看丑恶的颜色，不听淫邪的声音。
孙思邈（真人）说：生吃五种辛味蔬菜，节制熟食和饮食，极力向远处眺望，夜间读书注疏，长期居住在烟火缭绕的地方，下棋赌博不停歇，饮酒无度，
食用热烫的面食，多年从事抄写工作，雕刻精细巧妙的器物，房事没有节制，哭泣流泪过多，在月光下看书，夜晚观看星月，头部放血过多，
日落之后读书，多次直视太阳或月亮，极力远眺山川草木，骑马驰骋田猎，冒着风霜行走，迎着风追逐野兽，日夜不停，这些都是导致失明的原因，务必谨慎，务必谨慎。
书籍中说：心的神气发露于眼睛，久视则损伤心脏；肾的精气发露于耳朵，久听则损伤肾脏。
耳朵听淫靡之声，眼睛喜好美色，口舌嗜好美味，那么五脏就会震动而不安定，气血流动激荡而不安宁，精神飞散飘越而不能守持。
正气既然已经消散，淫邪之气便趁机侵入而引发疾病。
《叙书》中说：长时间注视日月星辰会损害视力，走路时不看井边（以免跌落），会折损寿命。所以井水沸腾时不要堵塞（防止蒸汽熏眼），否则会令人目盲耳聋，杀鸡斗殴则会导致气机郁结。各种颜色都会损害眼睛，只有黑色的屏风可以帮助增强视力。
《淮南子》说：缤纷的色彩扰乱视觉，使眼睛看不清楚；五音错乱听觉，使耳朵听不灵敏。又说：耳目怎么能长久地劳累运动而不停息呢？
有个人八十多岁，眼珠清澈明亮，能在夜间阅读蝇头小字。他说：我不服用药物，只是稍微不吃牲畜的肝脏。人们根据《本草》中“羊肝明目”的说法对此感到怀疑。我说：羊肝能明目，这是它的本性，其他动物的肝脏就不是这样了。牲畜在临死宰杀之时，愤怒之气聚集在肝脏里。肝主藏血，（充满怒气的血）不利于眼睛明亮。
Laozi said: The five colors blind the eyes, and the five tones deafen the ears.
Peng Zu said: Licentious and mournful sounds, though pleasing to the heart and ears, lead to the disaster of indulgence and neglect. How can one achieve longevity in such a manner?
Confucius said: Do not look at what is contrary to propriety; do not listen to what is contrary to propriety.
Mencius said: Bo Yi did not look at ugly colors, nor did he listen to licentious sounds.
Sun Simiao (Zhenren) said: Raw consumption of the five pungent vegetables, lack of moderation in cooked food and drink, straining the eyes by gazing into the distance, reading commentaries at night, long-term residence in smoky environments, incessant chess playing and gambling, unceasing alcohol consumption,
eating hot meals and wheat-based foods, years of copying manuscripts, carving fine and intricate patterns, immoderation in sexual activity, excessive weeping and tearing, reading under moonlight, viewing stars and the moon at night, excessive bloodletting from the head,
reading after sunset, repeatedly staring at the sun or moon, gazing far at mountains, rivers, trees, and grass, riding and hunting, exposing oneself to wind and frost, chasing beasts against the wind, day and night without rest—all these are causes of blindness. Be cautious, be cautious.
Books state: The spirit of the Heart manifests through the eyes; prolonged visual strain injures the Heart. The essence of the Kidney manifests through the ears; prolonged auditory strain injures the Kidney.
Listening to licentious sounds, desiring beautiful sights, and craving delicious tastes cause the Five Zang Organs to tremble and become unstable, the Qi and Blood to surge and remain restless, and the Spirit to fly away and fail to reside within.
Once the Upright Qi (Zheng Qi) dissipates, licentious and pathogenic Qi takes advantage of this weakness to cause disease.
The *Xu Shu* states: Prolonged gazing at the sun, moon, and stars damages the eyes; failing to watch one's step near wells and pits shortens life. Therefore, do not block boiling well water, as it causes blindness and deafness; killing chickens for fighting leads to Qi stagnation. All colors damage the eyes, except black lacquer screens, which can aid vision.
The *Huainanzi* states: The five colors confuse the eyes, making vision unclear; the five tones distort the ears, making hearing dull. It also states: How can the eyes and ears endure long-term labor and movement without rest?
There was an individual over eighty years old whose eyes were clear and bright, capable of reading tiny characters at night. He said: I take no medicine, but I merely avoid eating the livers of domestic animals. People doubted this based on the *Bencao* (Compendium of Materia Medica) claim that "sheep liver brightens the eyes." I replied: Sheep liver brightens the eyes due to its inherent nature; other animal livers do not share this property. When livestock are slaughtered, their anger accumulates in the liver. Since the Liver governs the storage of Blood, [blood filled with anger] is detrimental to clear vision.