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The "Syndrome Due to Wind" refers to eye diseases occurring in patients suffering from wind disorders. In the Five Elements, wind corresponds to Wood; in the Zang-Fu organs, it corresponds to the Liver; and orifices, the liver opens into the eyes. These three originate from the same Qi. Therefore, individuals with wind disorders invariably present with eye pathology. However, the onset must be triggered by specific causes: some have a short duration with shallow stagnation, manifesting as eyelid deviation or strabismus; some involve transmission to the Spleen, where dampness overcomes, resulting in redness and ulceration of the eyelids; some arise from blood deficiency and weak sinews, causing tremors and convulsions; some result from excessive depletion of spirit, combined with indulgence in dry and hot foods, leading to internal cataracts (Internal Opacity); others stem from excess wind and blood stasis, forming external opacities such as pterygium-like growths. Treatment requires attacking the root cause according to the specific syndrome, with internal and external therapies differing accordingly. Generally, for eye diseases caused by wind, dispelling wind must be the priority. If wind is not eliminated, eye disease will inevitably recur.

The "Syndrome Due to Toxicity" refers to eye diseases secondary to skin sores, ulcers, and toxic swellings. If eye symptoms occur during the active phase of toxicity, curing the toxicity will also resolve the eye condition. If the toxicity resolves but the eye disease persists, it indicates that pathogenic factors have penetrated to the deepest upper regions and cannot retreat spontaneously. In such cases, one must dredge the root and clarify the source. Severe stimulation may lead to complications involving blood stasis.

Eye diseases caused by other syndromes vary in manifestation. For instance: in Yang syndromes of Cold Damage (Shanghan), heat stagnation steams and damages the pupil, constituting an Internal Syndrome; excessive heat and blood stasis causing redness, pain, tearing, and dryness constitute an External Syndrome. Blindness due to Yang collapse in Yin syndromes is an Internal Syndrome; excessive use of warming agents like Ginger and Aconite causing fire-dryness, redness, and dryness is an External Syndrome. Heat from malaria damaging the pupil is an Internal Syndrome; fire stagnating in blood causing redness and dryness is an External Syndrome. Blurred vision after diarrhea/dysentery results from insufficient Grain Qi and damaged Qi failing to nourish, which is an Internal Syndrome. Dim vision due to mountain miasma involves pathogenic qi obscuring healthy qi, which is an External Syndrome. Abdominal distension with fullness and redness/pain results from Yin deficiency failing to control Yang pathogenic factors, which is an Internal Syndrome. Qi stagnation syndromes often involve depression, while deficiency syndromes often involve blurred vision; both are Internal Syndromes. Phlegm syndromes present with sticky secretions, and Fire syndromes present with redness and dryness; both are External Syndromes. Treatment should trace the source and address it accordingly.

If eye diseases are left untreated, hoping for spontaneous recovery through endurance, or if treatment is inappropriate, violating contraindications, damaging meridians and collaterals, allowing pathogens to penetrate deeply, and further neglecting treatment, the pathogens will knot and intertwine, unable to disperse. They will erupt at the predicted time. At this stage, one must carefully examine the morphological signs and subtle pulse characteristics, differentiate the affected meridian/region, and then proceed with treatment.