条文：内障初患如好眼，生花视物雾烟中，隐隐似翳瞳失彩，久变黄绿黑乌青，
黄风雀目久金色，绿风时见花白红，头旋额鼻目牵痛，黑风见黑绿风向，
乌风亦与绿不异，但痛不旋乃乌风，头旋不痛青风证。瞳黄黄风发脾经，
浅绿如白肺经发，黑色黑风肾经名，乌带浑红心经病，青是青风属肝经。
外因头风痛引目，脑脂热注忽失明；内因精伤不上注，左右相传渐渐盲。
或兼外因皆赤痛，内因不足补其精。
方剂：
【注】[1]内障初患，如同好眼，但视物常见五色花飞，昏而不明，如在雾烟之
中，瞳中隐隐似翳，渐无精采射人，其瞳色或变黄、白、绿、乌、黑
，浑红无定，久则成五风，内障之证也。
[2]黄风者，初病雀目，日久瞳变黄色，甚而如金，难治之证也。
[3]绿风者，初病眼前时见白花红花，头旋，两额侠鼻痛牵两目，日久瞳
变浅绿如白之色。
[4]黑风者，初病与绿风相同，但时见黑花日久瞳变昏黑之色。
[5]乌风者，初病亦与绿风之证不异，但头痛而不旋晕，眼前常见乌花，
日久瞳变乌带浑红之色。
[6]青风者，初病亦与乌风相同，头虽旋晕而不痛，眼前常见青花，日久
瞳变青色。
[7]其五风发病之源，黄风则发于脾经，绿风则发于肺经，黑风则发于肾
经，乌风则发于心经，青风则发于肝经。
[8]然风虽有五，其致病之由则有二：一曰外因，必因头风，其痛引目上
攻于脑，脑脂与热合邪，下注于目，而致两目忽然失明也，一曰内因
，必因内伤脏腑，精气不上注于目，或先病左目，后及于右目，或先
病右目，后及于左目，左右相传，两目俱损也。
[9]外因证属有余，多兼赤痛，当以除风散热为主；内因证属不足，多不
赤痛，当以补精益气为主。
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At the initial stage of internal obstruction (Nei Zhang), the eye appears healthy, but vision is often obscured by colorful visual disturbances (metamorphopsia), appearing dim and unclear as if amidst fog or smoke. The pupil seems to have a faint opacity and gradually loses its luster. If the condition persists for a long time, the pupil color may change to yellow, green, black, or cyan.
Specifically, in Yellow Wind syndrome (Huang Feng), it initially presents as night blindness (Que Mu), and over time the pupil turns yellow, even golden, which is a difficult-to-treat condition. In Green Wind syndrome (Lv Feng), one initially sees white or red floral phantoms before the eyes, accompanied by vertigo and pain in the temples and sides of the nose radiating to both eyes; over time, the pupil becomes light green, resembling white. In Black Wind syndrome (Hei Feng), the initial symptoms are similar to Green Wind, but with frequent black floral phantoms; over time, the pupil becomes dark and murky black. In Wu Wind syndrome (Wu Feng), the presentation is also similar to Green Wind, but characterized by headache without vertigo and frequent dark floral phantoms; over time, the pupil becomes dark black mixed with turbid red. In Cyan Wind syndrome (Qing Feng), the initial state is identical to Wu Wind, with vertigo but no pain, and frequent cyan floral phantoms; over time, the pupil turns cyan.
The origin of these five wind syndromes lies in specific meridians: Yellow Wind originates from the Spleen Meridian (Pi Jing); Green Wind, appearing light green like white, originates from the Lung Meridian (Fei Jing); Black Wind originates from the Kidney Meridian (Shen Jing); Wu Wind, appearing dark black with turbid red, belongs to Heart Meridian pathology (Xin Jing); and Cyan Wind belongs to the Liver Meridian (Gan Jing).
Although there are five types of wind, their etiology falls into two categories: External causes involve Head Wind (Tou Feng), where pain radiates to the eyes, pathogenic factors attack upward to the brain, and brain fluid combines with heat to descend into the eyes, causing sudden blindness in both eyes. Internal causes involve injury to the zang-fu organs, where essence and qi fail to ascend to nourish the eyes. The disease may start in the left eye and spread to the right, or start in the right and spread to the left, transmitting between sides until both eyes are damaged.
If external causes are involved, the condition is excess-type, often presenting with redness and pain, requiring treatment focused on dispelling wind and clearing heat. If internal deficiency is the cause, redness and pain are usually absent, requiring treatment focused on tonifying essence and boosting qi.