Cassia seeds come from the cassia, an annual plant that grows in tropical zones. Cassia seeds range in color from greenish brown to dark brown and yellowish red, with a smooth glossy surface. Since ancient times the Chinese have taken cassia seed as a daily tea to help promote clear vision. Cassia seeds are used in traditional Chinese medicine to benefit vision, reduce hypertension,and relieve constipation. The seeds are used to relieve itchy, red eyes in a patient that is suffering from cold and flu symptoms.
They are also used to treat red, painful eyes that are sensitive to light, excessively tearing up, and causing a headache.
