Liu Da-song,who is a well-known experienced doctor in Chinese medicine and focuses on ophthalmology, has following major academic thinkings.. 1. Pay attention to broader picture and unity.. Chinese ophthalmology is highly relative to both surgery and internal medicine. Followed by the unity concept, Chinese ophthalmology use the eight principles, organs, main and collateral channels, six meridians, triple energizer meridian,yingwei,qi and blood to diagnose symptoms and diseases, which is similar to internal medicine. At the same time, Methods l...