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The *Suwen* (Basic Questions), chapter "Tianyuanji Dalun" (Great Discussion on the Heavenly Origin), states: Heaven possesses the Five Phases, which govern the five directions and generate the Six Qi: Cold, Heat, Dryness, Dampness, Wind, and Fire. When these Qi are in their proper positions, they are correct; when excessive, they become pathogenic influences (Yin). If humans are invaded by these pathogens, they can all cause ocular diseases. Wind causes tearing, redness, and swelling; Cold causes blood coagulation and purplish distension; Summer-heat causes redness, darkness, and blurred vision; Dampness causes erosion and ulceration leading to tinea-like lesions; Dryness causes tightness, astringency, and accumulation of eye discharge; Fire causes redness, swelling, congestion, and pain. For treatment, Wind should be dispersed, and Cold should be warmed; Summer-heat should be cleared, and Dampness should be drained; Dryness should be moistened, and Fire should be cooled. Once the differentiation is clear, treatment becomes easy. However, pathogens often come mixed together. Since Wind is the leader of a hundred diseases, it may accompany Cold, Summer-heat, Dampness, Dryness, or Fire. There are also cases where pathogens transform into one another, such as Wind transforming into Fire, Cold transforming into Fire, Dampness transforming into Fire, and Dryness transforming into Fire. Wind pathogen arises first, followed by Fire pathogen; therefore, most ocular diseases are considered to be caused by Wind and Fire. Nevertheless, Wind-Fire syndromes require detailed differentiation. If one sees a Fire syndrome and treats it with dispersing methods regardless of whether Wind is present or not, harm is rarely avoided. Wind belongs to Yang pathogens and must involve external contraction to be true Wind. Heat generated by Wind subsides when the Wind dissipates; this type of Wind is suitable for dispersing. If there is no external contraction, but rather internal Fire flaming upward causing extreme heat to generate Wind, the Wind subsides when the Heat clears; this type of Wind is not suitable for dispersing. Furthermore, multiple pathogens may arrive mixed together. Speaking of the four seasons: Winter disease involves only three characters: Wind, Cold, and Fire. Spring involves four: Wind, Cold, Dampness, and Fire. Summer involves five: Wind, Cold, Summer-heat, Dampness, and Fire. Autumn involves four: Wind, Cold, Dryness, and Fire. However, there are latent pathogens and transformations, so one cannot adhere rigidly to a single approach. Regrettably, many physicians, upon seeing initial symptoms of redness, swelling, discharge, and tearing, indiscriminately use exterior-dispersing methods regardless of the pathogen. When dispersing fails, they switch to harmonizing methods. When harmonizing fails, they switch to cooling methods. When cooling fails, they resort to tonification. If successful, they claim credit; if unsuccessful, they blame fate, acting calmly without shame, which is truly lamentable. I have written this treatise to analyze each case clearly, preventing confusion among complex and mixed syndromes. By correlating them with Zang-Fu organs, meridians, physical signs, and pulse images, no pathological truth will remain hidden.